Download R&S®VSE-K10x LTE DL Measurements User Manual

R&S®VSE-K10x (LTE Downlink)
LTE Downlink Measurements
User Manual
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User Manual
Test & Measurement
1176.8980.02 ─ 01
This manual applies to the R&S®VSE base software (1320.7500.02) version 1.10 and higher.
This manual describes functionality of the following R&S®VSE options:
●
R&S®VSE-K100 LTE FDD Measurement Application (1320.7545K02)
●
R&S®VSE-K104 LTE FDD Measurement Application (1320.7568K02)
The firmware of the instrument makes use of several valuable open source software packages. For information, see the "Open
Source Acknowledgement" on the user documentation CD-ROM (included in delivery).
Rohde & Schwarz would like to thank the open source community for their valuable contribution to embedded computing.
© 2015 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
E-mail: [email protected]
Internet: www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
The following abbreviations are used throughout this manual: R&S®VSE is abbreviated as R&S VSE.
R&S®VSE-K10x (LTE Downlink)
Contents
Contents
1 Preface.................................................................................................... 7
1.1
About this Manual......................................................................................................... 7
1.2
Documentation Overview............................................................................................. 7
1.3
Typographical Conventions.........................................................................................8
2 Welcome to the LTE Measurement Application................................ 10
2.1
Starting the LTE Measurement Application..............................................................10
2.2
Understanding the Display Information....................................................................10
3 Measurements and Result Displays...................................................13
3.1
Selecting Measurements............................................................................................ 13
3.2
Selecting Result Displays.......................................................................................... 13
3.3
Performing Measurements.........................................................................................14
3.4
I/Q Measurements....................................................................................................... 14
3.5
3GPP Test Scenarios.................................................................................................. 31
4 Configuration........................................................................................33
4.1
Configuring I/Q Measurements..................................................................................33
4.1.1
Configuration Overview.................................................................................................34
4.1.2
Defining Signal Characteristics..................................................................................... 35
4.1.3
Configuring MIMO Setups.............................................................................................40
4.1.4
Demodulating the PDSCH............................................................................................ 40
4.1.5
Configuring PDSCH Subframes....................................................................................42
4.1.6
Configuring the Synchronization Signal........................................................................ 48
4.1.7
Configuring the Reference Signal................................................................................. 49
4.1.8
Configuring the Positioning Reference Signal...............................................................49
4.1.9
Defining the PDSCH Resource Block Symbol Offset....................................................50
4.1.10
Configuring the PBCH...................................................................................................51
4.1.11
Configuring the PCFICH............................................................................................... 52
4.1.12
Configuring the PHICH..................................................................................................53
4.1.13
Configuring the PDCCH................................................................................................ 55
4.1.14
Configuring the EPDCCH..............................................................................................56
4.1.15
Configuring Shared Channels....................................................................................... 58
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4.1.16
Selecting the Input and Output Source......................................................................... 59
4.1.17
Defining the Frequency................................................................................................. 60
4.1.18
Defining Level Characteristics.......................................................................................61
4.1.19
Configuring the Data Capture....................................................................................... 63
4.1.20
Triggering Measurements............................................................................................. 65
4.1.21
Estimating Parameters..................................................................................................65
4.1.22
Compensating Measurement Errors............................................................................. 66
4.1.23
Configuring Demodulation Parameters......................................................................... 67
5 Analysis................................................................................................ 70
5.1
Configuring Tables / Numerical Results................................................................... 70
5.2
Evaluation Range........................................................................................................ 70
5.3
Scale.............................................................................................................................72
5.4
Result Settings............................................................................................................ 73
5.5
Markers........................................................................................................................ 74
6 Remote Control.................................................................................... 76
6.1
Overview of Remote Command Suffixes.................................................................. 76
6.2
Introduction................................................................................................................. 77
6.2.1
Conventions used in Descriptions.................................................................................77
6.2.2
Long and Short Form.................................................................................................... 78
6.2.3
Numeric Suffixes........................................................................................................... 78
6.2.4
Optional Keywords........................................................................................................ 79
6.2.5
Alternative Keywords.................................................................................................... 79
6.2.6
SCPI Parameters.......................................................................................................... 79
6.3
Remote Commands to Select the LTE Application..................................................82
6.4
Configuring the Screen Layout..................................................................................82
6.4.1
General Layout..............................................................................................................82
6.4.2
Configuring the Layout over all Channels..................................................................... 82
6.4.3
Configuring the Layout of a Channel.............................................................................87
6.5
Remote Commands to Read Trace Data...................................................................92
6.5.1
Using the TRACe[:DATA] Command............................................................................ 92
6.5.2
Remote Commands to Read Measurement Results...................................................104
6.6
Remote Commands to Read Numeric Results.......................................................105
6.6.1
Frame Results.............................................................................................................105
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6.6.2
Result for Selection..................................................................................................... 106
6.6.3
Marker Table............................................................................................................... 113
6.7
Remote Commands to Read Limit Check Results.................................................114
6.7.1
Checking Limits for Numerical Result Display............................................................ 114
6.8
Remote Commands to Configure the Application................................................. 119
6.8.1
General Configuration................................................................................................. 120
6.8.2
Configuring I/Q Measurements................................................................................... 120
6.9
Analysis..................................................................................................................... 158
6.9.1
Evaluation Range........................................................................................................158
6.9.2
Y-Axis Scale................................................................................................................161
6.9.3
Result Settings............................................................................................................ 162
A Annex: Reference...............................................................................164
A.1
Common R&S VSE Menus....................................................................................... 164
A.1.1
File Menu.................................................................................................................... 164
A.1.2
Window Menu............................................................................................................. 165
A.1.3
Help Menu...................................................................................................................166
A.2
LTE Measurement Menus.........................................................................................166
A.2.1
Input & Output Menu................................................................................................... 166
A.2.2
Meas Setup Menu....................................................................................................... 167
A.2.3
Trace Menu................................................................................................................. 167
A.2.4
Marker Menu............................................................................................................... 167
A.2.5
Limits Menu.................................................................................................................168
List of Commands..............................................................................169
Index....................................................................................................174
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Contents
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R&S®VSE-K10x (LTE Downlink)
Preface
About this Manual
1 Preface
1.1 About this Manual
This User Manual describes information specific to measurements in the LTE measurement application. All other applications are described in the corresponding application manuals.
The main focus in this manual is on the measurement results and the tasks required to
obtain them. The following topics are included:
●
Welcome to the R&S VSE
Introduction to and getting familiar with the software
●
Measurements and Results
Descriptions of the measurement types available in the R&S VSE software
●
Controlling Instruments and Capturing I/Q Data
Methods of data acquisition and description of basic instrument control functions
●
LTE Measurements
Description of the settings and functions provided to analyze results with the software and the corresponding remote control commands
●
Remote Commands for LTE Measurements
Remote commands required to configure and perform measurements in a remote
environment, sorted by tasks
Remote commands required to set up the environment and to perform common
tasks in the software, sorted by tasks
Programming examples demonstrate the use of many commands and can usually
be executed directly for test purposes
●
List of Commands
Alpahabetical list of all remote commands described in the manual
●
Index
1.2 Documentation Overview
The user documentation for the R&S VSE consists of the following parts:
●
"Getting Started" printed manual
●
Online Help system in the software
●
CD-ROM including the following documentation:
– Getting Started
–
User Manuals for base software and options
–
Service Manual
–
Release Notes
–
Data sheet and product brochures
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Preface
Typographical Conventions
Online Help
The Online Help is embedded in the software. It offers quick, context-sensitive access
to the complete information needed for operation and programming. Online help is
available using the icon on the toolbar of the R&S VSE.
Getting Started
This manual is delivered with the software in printed form and in PDF format on the
CD. It provides the information needed to set up and start working with the software.
Basic operations and handling are described. Safety information is also included.
User Manuals
User manuals are provided for the base software and each additional (software)
option.
The user manuals are available in PDF format - in printable form - on the CD-ROM
delivered with the software. In the user manuals, all software functions are described in
detail. Furthermore, they provide a complete description of the remote control commands with programming examples.
The user manual for the base software provides basic information on operating the
R&S VSE in general, and the I/Q Analyzer application in particular. Furthermore, the
software functions that enhance the basic functionality for various applications are
described here. An introduction to remote control is provided, as well as information on
troubleshooting.
In the individual application manuals, the specific software functions of the application
are described in detail. For additional information on default settings and parameters,
refer to the data sheets. Basic information on operating the R&S VSE is not included in
the application manuals.
Release Notes
The release notes describe the installation of the software, new and modified functions,
eliminated problems, and last minute changes to the documentation. The corresponding software version is indicated on the title page of the release notes.
1.3 Typographical Conventions
The following text markers are used throughout this documentation:
Convention
Description
"Graphical user interface elements"
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
KEYS
Key names are written in capital letters.
File names, commands,
program code
File names, commands, coding samples and screen output are distinguished by their font.
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Preface
Typographical Conventions
Convention
Description
Input
Input to be entered by the user is displayed in italics.
Links
Links that you can click are displayed in blue font.
"References"
References to other parts of the documentation are enclosed by quotation marks.
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R&S®VSE-K10x (LTE Downlink)
Welcome to the LTE Measurement Application
Starting the LTE Measurement Application
2 Welcome to the LTE Measurement Application
The R&S VSE-K100 and -K104 are firmware applications that add functionality to perform measurements on LTE signals according to the 3GPP standard to the R&S VSE.
This user manual contains a description of the functionality that the application provides, including remote control operation. Functions that are not discussed in this manual are the same as in the Spectrum application and are described in the R&S VSE
User Manual. The latest versions of the manuals are available for download at the
product homepage.
●
●
Starting the LTE Measurement Application.............................................................10
Understanding the Display Information................................................................... 10
2.1 Starting the LTE Measurement Application
The LTE measurement application adds a new application to the R&S VSE.
To activate the LTE application
1.
Select the "Add Channel" function in the Sequence tool window.
A dialog box opens that contains all operating modes and applications currently
available in your R&S VSE.
2. Select the "LTE" item.
The R&S VSE opens a new measurement channel for the LTE application.
The application is started with the default settings. It can be configured in the "Overview" dialog box, which is displayed when you select the "Overview" softkey from the
"Meas Setup" menu.
For more information see chapter 4, "Configuration", on page 33.
2.2 Understanding the Display Information
The following figure shows a measurement diagram during analyzer operation. All different information areas are labeled. They are explained in more detail in the following
sections.
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Welcome to the LTE Measurement Application
Understanding the Display Information
1
1
2
3
4
5
=
=
=
=
=
2
3
4
5
Window title bar with information about the diagram and its traces
Channel bar with measurement settings
Diagram area
Diagram footer with information about the contents of the diagram
Color code for windows of the same channel (here: red)
Channel bar information
In the LTE measurement application, the R&S VSE shows the following settings:
Table 2-1: Information displayed in the channel bar in the LTE measurement application
Ref Level
Reference level
Att
Mechanical and electronic RF attenuation
Freq
Frequency
Mode
LTE standard
MIMO
Number of Tx and Rx antennas in the measurement setup
Capture Time
Signal length that has been captured
Frame Count
Number of frames that have been captured
Selected Subframe
Subframe considered in the signal analysis
In addition, the channel bar also displays information on instrument settings that affect
the measurement results even though this is not immediately apparent from the display
of the measured values (e.g. transducer or trigger settings). This information is displayed only when applicable for the current measurement. For details see the
R&S VSE Getting Started manual.
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Welcome to the LTE Measurement Application
Understanding the Display Information
Window title bar information
The information in the window title bar depends on the result display.
The "Constellation Diagram", for example, shows the number of points that have been
measured.
Status bar information
Global instrument settings, the instrument status and any irregularities are indicated in
the status bar beneath the diagram. Furthermore, the progress of the current operation
is displayed in the status bar.
Regarding the synchronization state, the application shows the following labels.
●
Sync OK
The synchronization was successful. The status bar is green.
●
Sync Failed
The synchronization was not successful. The status bar is red.
There can be three different synchronization errors.
– Sync Failed (Cyclic Prefix): The cyclic prefix correlation failed.
–
Sync Failed (P-SYNC): The P-SYNC correlation failed.
–
Sync Failed (S-SYNC): The S-SYNC correlation failed.
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Measurements and Result Displays
Selecting Measurements
3 Measurements and Result Displays
The LTE measurement application measures and analyzes various aspects of an LTE
signal.
It features several measurements and result displays. Measurements represent different ways of processing the captured data during the digital signal processing. Result
displays are different representations of the measurement results. They may be diagrams that show the results as a graph or tables that show the results as numbers.
●
●
●
●
●
Selecting Measurements.........................................................................................13
Selecting Result Displays........................................................................................13
Performing Measurements......................................................................................14
I/Q Measurements...................................................................................................14
3GPP Test Scenarios..............................................................................................31
3.1 Selecting Measurements
► Select the "Select Meas" menu item from the "Meas Setup" menu.
The application opens a dialog box that contains several buttons.
Each button represents a set of result displays that thematically belong together
and that have a particular display configuration. If these predefined display configurations do not suit your requirements you can add or remove result displays as you
like. For more information about selecting result displays see chapter 3.2, "Selecting Result Displays", on page 13.
Depending on the button you select, the application changes the way the R&S VSE
captures and processes the raw signal data.
●
When you select "EVM", the application processes the I/Q data of the signal. For
more information on available I/Q result displays see chapter 3, "Measurements
and Result Displays", on page 13.
When you select one of the result displays available for I/Q measurements, you
can combine the result displays available for I/Q measurements in any way.
Remote command:
CONFigure[:LTE]:MEASurement on page 120
3.2 Selecting Result Displays
► Select the "New Window" menu item from the "Window" menu or select a new winicon in the toolbar. Depending on the number of LTE channel you
dow with the
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Measurements and Result Displays
Performing Measurements
are currently using, there is a submenu that contains all available result displays for
each LTE channel.
In the default state of the application, it shows several conventional result displays.
●
Capture Buffer
●
EVM vs Carrier
●
Power Spectrum
●
Result Summary
●
Constellation Diagram
From that predefined state, add and remove result displays to the channels as you like
from the "Window" menu.
Remote command:
LAYout:ADD[:WINDow]? on page 87
Note that you can customize the contents of some numerical result displays. For more
information see chapter 5.1, "Configuring Tables / Numerical Results", on page 70.
3.3 Performing Measurements
By default, the application measures the signal continuously. In "Continuous Sweep"
mode, the application captures and analyzes the data again and again. The amount of
data depends on the capture time (I/Q measurements) or the sweep time (frequency
sweep measurements). In "Single Sweep" mode, the application stops measuring after
it has captured the data once. The amount of data again depends on the capture time
or the sweep time.
You can also repeat a measurement based on the data that has already been captured
with the "Refresh" function. This is useful if you want to apply different modulation settings to the same I/Q data, for example.
For more information see the documentation of the R&S VSE.
3.4 I/Q Measurements
You can select the result displays from the evaluation bar and arrange them as you like
with the SmartGrid functionality.
Capture Buffer...............................................................................................................15
EVM vs Carrier..............................................................................................................16
EVM vs Symbol.............................................................................................................17
EVM vs RB....................................................................................................................18
EVM vs Subframe......................................................................................................... 19
Frequency Error vs Symbol...........................................................................................19
Power Spectrum............................................................................................................20
Power vs Resource Block PDSCH................................................................................20
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Measurements and Result Displays
I/Q Measurements
Power vs Resource Block RS....................................................................................... 21
Channel Flatness.......................................................................................................... 21
Channel Group Delay....................................................................................................22
Channel Flatness Difference.........................................................................................22
Constellation Diagram...................................................................................................23
CCDF............................................................................................................................ 23
Allocation Summary...................................................................................................... 24
Bit Stream..................................................................................................................... 25
Channel Decoder Results............................................................................................. 25
EVM vs Sym x Carr.......................................................................................................27
Power vs Symbol x Carrier............................................................................................28
Allocation ID vs Symbol x Carrier..................................................................................28
Result Summary............................................................................................................29
Marker Table................................................................................................................. 31
Capture Buffer
The Capture Buffer result display shows the complete range of captured data for the
last data capture. The x-axis represents time. The maximum value of the x-axis is
equal to the Capture Time. The y-axis represents the amplitude of the captured I/Q
data in dBm (for RF input).
The bar at the bottom of the diagram represents the frame that is currently analyzed.
Different colors indicate the OFDM symbol type.
●
●
●
●
Indicates the data stream.
Indicates the reference signal and data.
Indicates the P-SYNC and data.
Indicates the S-SYNC and data.
A green vertical line at the beginning of the green bar in the Capture Buffer display
marks the subframe start. Additionally, the diagram contains the "Start Offset" value.
This value is the time difference between the subframe start and capture buffer start.
When you zoom into the diagram, you will see that the bar may be interrupted at certain positions. Each small bar indicates the useful parts of the OFDM symbol.
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Measurements and Result Displays
I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,CBUF
Querying results: TRACe:DATA?
Querying the subframe start offset: FETCh:SUMMary:TFRame? on page 112
EVM vs Carrier
Starts the EVM vs Carrier result display.
This result display shows the Error Vector Magnitude (EVM) of the subcarriers. With
the help of a marker, you can use it as a debugging technique to identify any subcarriers whose EVM is too high.
The results are based on an average EVM that is calculated over the resource elements for each subcarrier. This average subcarrier EVM is determined for each analyzed subframe in the capture buffer.
If you analyze all subframes, the result display contains three traces.
● Average EVM
This trace shows the subcarrier EVM averaged over all subframes.
● Minimum EVM
This trace shows the lowest (average) subcarrier EVM that has been found over
the analyzed subframes.
● Maximum EVM
This trace shows the highest (average) subcarrier EVM that has been found over
the analyzed subframes.
If you select and analyze one subframe only, the result display contains one trace that
shows the subcarrier EVM for that subframe only. Average, minimum and maximum
values in that case are the same. For more information see "Subframe Selection"
on page 70
The x-axis represents the center frequencies of the subcarriers. On the y-axis, the
EVM is plotted either in % or in dB, depending on the EVM Unit.
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Measurements and Result Displays
I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,EVCA
Querying results: TRACe:DATA?
EVM vs Symbol
Starts the EVM vs Symbol result display.
This result display shows the Error Vector Magnitude (EVM) of the OFDM symbols.
You can use it as a debugging technique to identify any symbols whose EVM is too
high.
The results are based on an average EVM that is calculated over all subcarriers that
are part of a particular OFDM symbol. This average OFDM symbol EVM is determined
for all OFDM symbols in each analyzed subframe.
If you analyze all subframes, the result display contains three traces.
● Average EVM
This trace shows the OFDM symbol EVM averaged over all subframes.
● Minimum EVM
This trace shows the lowest (average) OFDM symbol EVM that has been found
over the analyzed subframes.
● Maximum EVM
This trace shows the highest (average) OFDM symbol EVM that has been found
over the analyzed subframes.
If you select and analyze one subframe only, the result display contains one trace that
shows the OFDM symbol EVM for that subframe only. Average, minimum and maximum values in that case are the same. For more information see "Subframe Selection"
on page 70
The x-axis represents the OFDM symbols, with each symbol represented by a dot on
the line. The number of displayed symbols depends on the Subframe Selection and the
length of the cyclic prefix. Any missing connections from one dot to another mean that
the R&S VSE could not determine the EVM for that symbol. In case of TDD signals,
the result display does not show OFDM symbols that are not part of the measured link
direction.
On the y-axis, the EVM is plotted either in % or in dB, depending on the EVM Unit.
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Measurements and Result Displays
I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,EVSY
Querying results: TRACe:DATA?
EVM vs RB
Starts the EVM vs RB result display.
This result display shows the Error Vector Magnitude (EVM) for all resource blocks that
can be occupied by the PDSCH.
The results are based on an average EVM that is calculated over all resource elements
in the resource block. This average resource block EVM is determined for each analyzed subframe.
If you analyze all subframes, the result display contains three traces.
● Average EVM
This trace shows the resource block EVM averaged over all subframes.
● Minimum EVM
This trace shows the lowest (average) resource block EVM that has been found
over the analyzed subframes.
● Maximum EVM
This trace shows the highest (average) resource block EVM that has been found
over the analyzed subframes.
If you select and analyze one subframe only, the result display contains one trace that
shows the resource block EVM for that subframe only. Average, minimum and maximum values in that case are the same. For more information see "Subframe Selection"
on page 70
The x-axis represents the PDSCH resource blocks. On the y-axis, the EVM is plotted
either in % or in dB, depending on the EVM Unit.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,EVRP
Querying results: TRACe:DATA?
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Measurements and Result Displays
I/Q Measurements
EVM vs Subframe
Starts the EVM vs Subframe result display.
This result display shows the Error Vector Magnitude (EVM) for each subframe. You
can use it as a debugging technique to identify a subframe whose EVM is too high.
The result is an average over all subcarriers and symbols of a specific subframe.
The x-axis represents the subframes, with the number of displayed subframes being
10.
On the y-axis, the EVM is plotted either in % or in dB, depending on the EVM Unit.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,EVSU
Querying results: TRACe:DATA?
Frequency Error vs Symbol
Starts the Frequency Error vs Symbol result display.
This result display shows the Frequency Error on symbol level. You can use it as a
debugging technique to identify any frequency errors within symbols.
The result is an average over all subcarriers.
The x-axis represents the OFDM symbols, with each symbol represented by a dot on
the line. The number of displayed symbols depends on the Subframe Selection and the
length of the cyclic prefix. Any missing connections from one dot to another mean that
the R&S VSE could not determine the frequency error for that symbol. On the y-axis,
the frequency error is plotted in Hz.
Note that the variance of the measurement results in this result display may be much
higher compared to the frequency error display in the Result Summary, depending on
the PDSCH and control channel configuration. The potential difference is caused by
the number of available resource elements for the measurement on symbol level.
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Measurements and Result Displays
I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,FEVS
Querying results: TRACe:DATA?
Power Spectrum
Starts the Power Spectrum result display.
This result display shows the power density of the complete capture buffer in dBm/Hz.
The displayed bandwidth depends on bandwidth or number of resource blocks you
have set.
For more information see "Channel Bandwidth / Number of Resource Blocks"
on page 37.
The x-axis represents the frequency. On the y-axis the power level is plotted.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,PSPE
Querying results: TRACe:DATA?
Power vs Resource Block PDSCH
Starts the Power vs Resource Block PDSCH result display.
This result display shows the power of the physical downlink shared channel per
resource element averaged over one resource block.
By default, three traces are shown. One trace shows the average power. The second
and the third trace show the minimum and maximum powers respectively. You can
select to display the power for a specific subframe in the Subframe Selection dialog
box. In that case, the application shows the powers of that subframe only.
The x-axis represents the resource blocks. The displayed number of resource blocks
depends on the channel bandwidth or number of resource blocks you have set. On the
y-axis, the power is plotted in dBm.
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Measurements and Result Displays
I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,PVRP
Querying results: TRACe:DATA?
Power vs Resource Block RS
Starts the Power vs Resource Block RS result display.
This result display shows the power of the reference signal per resource element averaged over one resource block.
By default, three traces are shown. One trace shows the average power. The second
and the third trace show the minimum and maximum powers respectively. You can
select to display the power for a specific subframe in the Subframe Selection dialog
box. In that case, the application shows the power of that subframe only.
The x-axis represents the resource blocks. The displayed number of resource blocks
depends on the channel bandwidth or number of resource blocks you have set. On the
y-axis, the power is plotted in dBm.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,PVRR
Querying results: TRACe:DATA?
Channel Flatness
Starts the Channel Flatness result display.
This result display shows the relative power offset caused by the transmit channel.
The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the channel flatness is plotted in
dB.
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I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,FLAT
Querying results: TRACe:DATA?
Channel Group Delay
Starts the Channel Group Delay result display.
This result display shows the group delay of each subcarrier.
The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the group delay is plotted in ns.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,GDEL
Querying results: TRACe:DATA?
Channel Flatness Difference
Starts the Channel Flatness Difference result display.
This result display shows the level difference in the spectrum flatness result between
two adjacent physical subcarriers.
The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the power is plotted in dB.
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I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,FDIF
Querying results: TRACe:DATA?
Constellation Diagram
Starts the Constellation Diagram result display.
This result display shows the inphase and quadrature phase results and is an indicator
of the quality of the modulation of the signal.
In the default state, the result display evaluates the full range of the measured input
data. You can filter the results by changing the evaluation range.
The constellation diagram also contains information about the current evaluation
range. In addition, it shows the number of points that are displayed in the diagram.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,CONS
Querying results: TRACe:DATA?
CCDF
Starts the Complementary Cumulative Distribution Function (CCDF) result display.
This result display shows the probability of an amplitude exceeding the mean power.
For the measurement, the complete capture buffer is used.
The x-axis represents the power relative to the measured mean power. On the y-axis,
the probability is plotted in %.
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I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,CCDF
Querying results: TRACe:DATA?
Allocation Summary
Starts the Allocation Summary result display.
This result display shows the results of the measured allocations in tabular form.
The rows in the table represent the allocations, with allocation ALL being a special allocation that summarizes all allocations that are part of the subframe. A set of allocations
form a subframe. The subframes are separated by a dashed line. The columns of the
table contain the following information:
●
●
●
●
●
●
●
Subframe
Shows the subframe number.
Allocation ID
Shows the type / ID of the allocation.
Number of RB
Shows the number of resource blocks assigned to the corresponding PDSCH allocation.
Rel. Power/dB
Shows the relative power of the allocation.
Note that no power is calculated for the PHICH if Boosting Estimation has been
turned on. For more information see PHICH Rel Power.
Modulation
Shows the modulation type.
Power per RE [dBm]
Shows the power of each resource element in dBm.
EVM
Shows the EVM of the allocation. The unit depends on your selection.
Note: Contents of the Allocation Summary
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I/Q Measurements
The number of columns shown in the Allocation Summary is variable. To add or
remove a column, click on the header row of the table once. The application opens a
dialog box to select the columns which you'd like to display.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,ASUM
Querying results: TRACe:DATA?
Bit Stream
Starts the Bit Stream result display.
This result display shows the demodulated data stream for each data allocation.
Depending on the Bit Stream Format, the numbers represent either bits (bit order) or
symbols (symbol order).
Selecting symbol format shows the bit stream as symbols. In that case the bits belonging to one symbol are shown as hexadecimal numbers with two digits. In the case of bit
format, each number represents one raw bit.
Symbols or bits that are not transmitted are represented by a "-".
If a symbol could not be decoded because the number of layers exceeds the number
of receive antennas, the application shows a "#" sign.
The table contains the following information:
●
●
●
●
●
●
Subframe
Number of the subframe the bits belong to.
Allocation ID
Channel the bits belong to.
Codeword
Code word of the allocation.
Modulation
Modulation type of the channels.
Symbol Index or Bit Index
Shows the position of the table row's first bit or symbol within the complete stream.
Bit Stream
The actual bit stream.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,BSTR
Querying results: TRACe:DATA?
Channel Decoder Results
The Channel Decoder result display is a numerical result display that shows the characteristics of various channels for a particular subframe.
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I/Q Measurements
●
●
●
●
Protocol information of the PBCH, PCFICH and PHICH.
Information about the DCIs in the PDCCH.
Decoded bitstream for each PDCCH.
Decoded bitstream for each PDSCH.
The size of the table thus depends on the number of subframes in the signal.
Note that a complete set of results for the control channels is available only under certain circumstances.
●
●
The corresponding control channel (PBCH, PCFICH or PHICH) has to be present
and enabled.
Each channel must have a certain configuration (see list below).
For each channel, the table shows a different set of values.
● PBCH
For the PBCH, the Channel Decoder provides the following results.
– the MIMO configuration of the DUT (1, 2 or 4 TX antennas)
– the Transmission bandwidth
– the Duration of the PHICH (normal or extended)
– the PHICH resource which is the same as PHICH Ng (1/6, 1/2, 1 or 2)
– System frame number
●
●
●
If the CRC is not valid, a corresponding message is shown instead of the results.
Results for the PBCH can only be determined if the PHICH Duration or the PHICH
N_g are automatically determined ("Auto") or if automatic decoding of all control
channels is turned on.
PCFICH
For the PCFICH, the Channel Decoder provides the number of OFDM symbols that
are used for PDCCH at the beginning of a subframe.
PHICH
The PHICH carries the hybrid-ARQ ACK/NACK. Multiple PHICHs mapped to the
same set of resource elements are a PHICH group. The PHICHs within one group
are separated by different orthogonal sequences.
For the PHICH, the Channel Decoder provides the ACK/NACK pattern for the
PHICH group and the relative power for each PHICH in the PHICH group. Each
line in the result table represents one PHICH group. The columns on the left show
the ACK/NACK pattern of the PHICH group. The columns on the right show the relative powers for each PHICH.
If a PHICH is not transmitted, the table contains a "-" sign. Otherwise, the ACK/
NACK pattern is either a "1" (acknowledgement) or a "0" (not acknowledged). The
relative power is a numeric value in dB.
PDCCH
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For each PDCCH that has been detected, the Channel Decoder shows several
results. Each line in the table represents one PDCCH.
– RNTI
– DCI Format
Shows the Downlink Control Information (DCI) format. The DCI contains information about the resource assignment for the UEs.
The following DCI formats are supported: 0, 1, 1A, 1B, 1C, 2, 2A, 2C, 2D, 3,
3A.
The DCI format is determined by the length of the DCI. Because they have the
same length, the Channel Decoder is not able to distinguish formats 0, 3 and
3A. Note that a DCI that consist of only zero bits cannot be decoded.
– PDCCH format used to transmit the DCI
– CCE Offset
The CCE Offset represents the position of the current DCI in the PDCCH bit
stream.
– Rel. Power
Relative power ofthe corresponding PDCCH.
●
Results for the PDCCH can only be determined if the PDSCH subframe configuration is detected by the "PDCCH Protocol" or if automatic decoding of all control
channels is turned on.
PDSCH
For each decoded PDSCH allocation there is a PDCCH DCI. The DCI contains
parameters that are required for the decoding process. If the channel could be
decoded successfully, the result display shows the bit stream for each codeword.
If the Cyclic Redundancy Check (CRC) fails, the result display shows an error message instead.
Results for the PDSCH can only be determined if the PDSCH subframe configuration is detected by the "PDCCH Protocol" or if automatic decoding of all control
channels is turned on.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,CDEC
Querying results: TRACe:DATA?
EVM vs Sym x Carr
The EVM vs Symbol x Carrier shows the EVM for each carrier in each symbol.
The horizontal axis represents the symbols. The vertical axis represents the carriers.
Different colors in the diagram area represent the EVM. The color map for the power
levels is provided above the diagram area.
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I/Q Measurements
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,EVSC
Querying results: TRACe:DATA?
Power vs Symbol x Carrier
The Power vs Symbol x Carrier shows the power for each carrier in each symbol.
The horizontal axis represents the symbols. The vertical axis represents the carriers.
Different colors in the diagram area represent the power. The color map for the power
levels is provided above the diagram area.
Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,PVSC
Querying results: TRACe:DATA?
Allocation ID vs Symbol x Carrier
The Allocation ID vs. Symbol X Carrier display shows the allocation ID of each carrier
in each symbol of the received signal.
Each type of allocation is represented by a different color. Use a marker to get more
information about the type of allocation.
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Remote command:
Selecting the result display: LAY:ADD ? '1',LEFT,AISC
Querying results: TRACe:DATA?
Result Summary
The Result Summary shows all relevant measurement results in numerical form, combined in one table.
Remote command:
LAY:ADD ? '1',LEFT,RSUM
Contents of the result summary
The table is split in two parts. The first part shows results that refer to the complete
frame. For each result, the minimum, mean and maximum values are displayed. It also
indicates limit check results where available. The font of 'Pass' results is green and that
of 'Fail' results is red.
In addition to the red font, the application also puts a red star (
failed results.
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I/Q Measurements
EVM PDSCH QPSK
Shows the EVM for all QPSK-modulated resource elements of the PDSCH
channel in the analyzed frame.
FETCh[:CC<cci>]:SUMMary:EVM:DSQP[:AVERage]? on page 105
EVM PDSCH 16QAM
Shows the EVM for all 16QAM-modulated resource elements of the PDSCH
channel in the analyzed frame.
FETCh[:CC<cci>]:SUMMary:EVM:DSST[:AVERage]? on page 105
EVM PDSCH 64QAM
Shows the EVM for all 64QAM-modulated resource elements of the PDSCH
channel in the analyzed frame.
FETCh[:CC<cci>]:SUMMary:EVM:DSSF[:AVERage]? on page 106
By default, all EVM results are in %. To view the EVM results in dB, change the EVM
Unit.
The second part of the table shows results that refer to a specifc selection of the frame.
The statistic is always evaluated over the subframes.
The header row of the table contains information about the selection you have made
(like the subframe).
EVM All
Shows the EVM for all resource elements in the analyzed frame.
FETCh[:CC<cci>]:SUMMary:EVM[:ALL][:AVERage]? on page 107
EVM Phys Channel
Shows the EVM for all physical channel resource elements in the analyzed
frame.
A physical channel corresponds to a set of resource elements carrying information from higher layers. PDSCH, PBCH or PDCCH, for example, are physical channels. For more information see 3GPP 36.211.
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel[:AVERage]? on page 108
EVM Phys Signal
Shows the EVM for all physical signal resource elements in the analyzed
frame.
The reference signal, for example, is a physical signal. For more information
see 3GPP 36.211.
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal[:AVERage]? on page 108
Frequency Error
Shows the difference in the measured center frequency and the reference
center frequency.
FETCh[:CC<cci>]:SUMMary:FERRor[:AVERage]? on page 109
Sampling Error
Shows the difference in measured symbol clock and reference symbol clock
relative to the system sampling rate.
FETCh[:CC<cci>]:SUMMary:SERRor[:AVERage]? on page 112
I/Q Offset
Shows the power at spectral line 0 normalized to the total transmitted power.
FETCh[:CC<cci>]:SUMMary:IQOFfset[:AVERage]? on page 109
I/Q Gain Imbalance
Shows the logarithm of the gain ratio of the Q-channel to the I-channel.
FETCh[:CC<cci>]:SUMMary:GIMBalance[:AVERage]? on page 109
I/Q Quadrature Error
Shows the measure of the phase angle between Q-channel and I-channel
deviating from the ideal 90 degrees.
FETCh[:CC<cci>]:SUMMary:QUADerror[:AVERage]? on page 111
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3GPP Test Scenarios
RSTP
Shows the reference signal transmit power as defined in 3GPP TS 36.141. It
is required for the "DL RS Power" test.
It is an average power and accumulates the powers of the reference symbols
within a subframe divided by the number of reference symbols within a subframe.
FETCh[:CC<cci>]:SUMMary:RSTP[:AVERage]? on page 111
OSTP
Shows the OFDM symbol transmit power as defined in 3GPP TS 36.141.
It accumulates all subcarrier powers of the 4th OFDM symbol. The 4th (out of
14 OFDM symbols within a subframe (in case of frame type 1, normal CP
length)) contains exclusively PDSCH.
FETCh[:CC<cci>]:SUMMary:OSTP[:AVERage]? on page 110
Power
Shows the average time domain power of the analyzed signal.
FETCh[:CC<cci>]:SUMMary:POWer[:AVERage]? on page 110
Crest Factor
Shows the peak-to-average power ratio of captured signal.
FETCh[:CC<cci>]:SUMMary:CRESt[:AVERage]? on page 107
Marker Table
Displays a table with the current marker values for the active markers.
Remote command:
LAY:ADD? '1',RIGH, MTAB, see LAYout:ADD[:WINDow]? on page 87
Results:
CALCulate<n>:MARKer<m>:X on page 113
CALCulate<n>:MARKer<m>:Y? on page 114
3.5 3GPP Test Scenarios
3GPP defines several test scenarios for measuring base stations. These test scenarios
are described in detail in 3GPP TS 36.141.
The following table provides an overview which measurements available in the LTE
application are suited to use for the test scenarios in the 3GPP documents.
Table 3-1: Test scenarios for E-TMs as defined by 3GPP (3GPP TS 36.141)
Test Model
Test scenario
Test described in
Measurement
E-TM1.1
Base station output power
chapter 6.2
Power (➙ Result Summary)
Transmit On/Off power
chapter 6.4
On/Off Power
DL RS power
chapter 6.5.4
RSTP (➙ Result Summary)
Time alignment
chapter 6.5.3
Time Alignment Error
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3GPP Test Scenarios
Test Model
E-TM1.2
E-TM2
E-TM3.1
E-TM3.2
E-TM3.3
Test scenario
Test described in
Measurement
Transmitter intermodulation
chapter 6.7
ACLR
Occupied bandwidth
chapter 6.6.1
Occupied Bandwidth1
ACLR
chapter 6.6.2
ACLR
Operating band unwanted
emissions
chapter 6.6.3
Spectrum Emission Mask
Transmitter spurious emissions
chapter 6.6.4
Spurious Emissions1
ACLR
chapter 6.6.2
ACLR
Operating band unwanted
emissions
chapter 6.6.2
Spectrum Emission Mask
RE power control dynamic
range
chapter 6.3.1
Power results
Frequency error
chapter 6.5.1
Frequency Error (➙ Result
Summary)
Total power dynamic range
chapter 6.3.2
OSTP (➙ Result Summary)
Error Vector Magnitude
chapter 6.5.2
EVM results
RE power control dynamic
range
chapter 6.3.1
Power results
Total power dynamic range
chapter 6.3.2
OSTP (➙ Result Summary)
Frequency error
chapter 6.5.1
Frequency Error (➙ Result
Summary)
Error Vector Magnitude
chapter 6.5.2
EVM results
RE power control dynamic
range
chapter 6.3.1
Power results
Frequency error
chapter 6.5.1
Frequency Error (➙ Result
Summary)
Error Vector Magnitude
chapter 6.5.2
EVM results
RE power control dynamic
range
chapter 6.3.1
Power results
Frequency error
chapter 6.5.1
Frequency Error (➙ Result
Summary)
Error Vector Magnitude
chapter 6.5.2
EVM results
1these
measurements are available in the Spectrum application of the Rohde & Schwarz signal and spectrum analyzers (for example the R&S FSW)
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Configuration
Configuring I/Q Measurements
4 Configuration
LTE measurements require a special application on the R&S VSE, which you activate
using the MODE key on the front panel.
When you start the LTE application, the R&S VSE starts to measure the input signal
with the default configuration or the configuration of the last measurement (when you
haven't performed a preset since then).
Automatic refresh of preview and visualization in dialog boxes after configuration changes
The R&S VSE supports you in finding the correct measurement settings quickly and
easily - after each change in settings in dialog boxes, the preview and visualization
areas are updated immediately and automatically to reflect the changes. Thus, you can
see if the setting is appropriate or not before accepting the changes.
Unavailable menus
Note that the "Limits" and "Trace" menus have no contents and no function in the LTE
application.
●
Configuring I/Q Measurements............................................................................... 33
4.1 Configuring I/Q Measurements
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Configuration Overview...........................................................................................34
Defining Signal Characteristics............................................................................... 35
Configuring MIMO Setups.......................................................................................40
Demodulating the PDSCH...................................................................................... 40
Configuring PDSCH Subframes..............................................................................42
Configuring the Synchronization Signal.................................................................. 48
Configuring the Reference Signal........................................................................... 49
Configuring the Positioning Reference Signal.........................................................49
Defining the PDSCH Resource Block Symbol Offset..............................................50
Configuring the PBCH.............................................................................................51
Configuring the PCFICH......................................................................................... 52
Configuring the PHICH............................................................................................53
Configuring the PDCCH.......................................................................................... 55
Configuring the EPDCCH........................................................................................56
Configuring Shared Channels.................................................................................58
Selecting the Input and Output Source................................................................... 59
Defining the Frequency........................................................................................... 60
Defining Level Characteristics.................................................................................61
Configuring the Data Capture................................................................................. 63
Triggering Measurements....................................................................................... 65
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Configuring I/Q Measurements
●
●
●
Estimating Parameters............................................................................................65
Compensating Measurement Errors....................................................................... 66
Configuring Demodulation Parameters................................................................... 67
4.1.1 Configuration Overview
Throughout the measurement channel configuration, an overview of the most important
currently defined settings is provided in the "Overview". The "Overview" is displayed
when you select the "Overview" menu item from the "Meas Setup" menu.
In addition to the main measurement settings, the "Overview" provides quick access to
the main settings dialog boxes. The individual configuration steps are displayed in the
order of the data flow. Thus, you can easily configure an entire measurement channel
from input over processing to output and analysis by stepping through the dialog boxes
as indicated in the "Overview".
In particular, the "Overview" provides quick access to the following configuration dialog
boxes (listed in the recommended order of processing):
1. Signal Description
See chapter 4.1.2, "Defining Signal Characteristics", on page 35.
2. Input / Frontend
See chapter 4.1.16, "Selecting the Input and Output Source", on page 59.
3. Trigger / Signal Capture
See chapter 4.1.20, "Triggering Measurements", on page 65.
See chapter 4.1.19, "Configuring the Data Capture", on page 63
4. Estimation / Tracking
See chapter 4.1.22, "Compensating Measurement Errors", on page 66.
5. Demodulation
See chapter 4.1.23, "Configuring Demodulation Parameters", on page 67.
6. Evaluation Range
See chapter 5.2, "Evaluation Range", on page 70.
7. Analysis
See chapter 5, "Analysis", on page 70.
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8. Display Configuration
See chapter 3, "Measurements and Result Displays", on page 13.
In addition, the dialog box provides the "Select Measurement" button that serves as a
shortcut to select the measurement type.
To configure settings
► Select any button in the "Overview" to open the corresponding dialog box.
Select a setting in the channel bar (at the top of the measurement channel tab) to
change a specific setting.
Preset Channel
Select the "Preset Channel" button in the lower lefthand corner of the "Overview" to
restore all measurement settings in the current channel to their default values.
Remote command:
SYSTem:PRESet:CHANnel[:EXECute] on page 120
Select Measurement
Opens a dialog box to select the type of measurement.
Using this button has the same effect as selecting the "Select Measurement" menu
item in the "Meas Setup" menu.
For more information see chapter 3.1, "Selecting Measurements", on page 13.
Remote command:
CONFigure[:LTE]:MEASurement on page 120
Specifics for
The measurement channel may contain several windows for different results. Thus, the
settings indicated in the "Overview" and configured in the dialog boxes vary depending
on the selected window.
Select an active window from the "Specifics for" selection list that is displayed in the
"Overview" and in all window-specific configuration dialog boxes.
The "Overview" and dialog boxes are updated to indicate the settings for the selected
window.
4.1.2 Defining Signal Characteristics
The general signal characteristics contain settings to describe the general physical
attributes of the signal. They are part of the "Signal Description" tab of the "Signal
Description" dialog box.
To define signal characteristics
Signal characteristics settings can be defined in the "Signal Description" dialog box.
1. Select "Signal Description" from the "Overview" dialog box.
2. Press the MEAS CONFIG key and select the "Signal Description" softkey.
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Configuring I/Q Measurements
Selecting the LTE Mode................................................................................................36
Using Test Models........................................................................................................ 36
Channel Bandwidth / Number of Resource Blocks....................................................... 37
Cyclic Prefix.................................................................................................................. 37
Configuring TDD Frames.............................................................................................. 38
└ TDD UL/DL Allocations................................................................................... 38
└ Conf. of Special Subframe.............................................................................. 38
Configuring the Physical Layer Cell Identity..................................................................39
Selecting the LTE Mode
The standard defines the LTE mode you are testing.
The choices you have depend on the set of options you have installed.
●
●
Option xxx-K100 enables testing of 3GPP LTE FDD signals on both uplink and
downlink
Option xxx-K104 enables testing of 3GPP LTE MIMO signals on both uplink and
downlink
FDD and TDD are duplexing methods.
● FDD mode uses different frequencies for the uplink and the downlink.
● TDD mode uses the same frequency for the uplink and the downlink.
Downlink (DL) and Uplink (UL) describe the transmission path.
● Downlink is the transmission path from the base station to the user equipment. The
physical layer mode for the downlink is always OFDMA.
● Uplink is the transmission path from the user equipment to the base station. The
physical layer mode for the uplink is always SC-FDMA.
Remote command:
Link direction: CONFigure[:LTE]:LDIRection on page 124
Duplexing mode: CONFigure[:LTE]:DUPLexing on page 121
Using Test Models
Test models are descriptions of LTE signals that you can use for particular test scenarios.
The "Test Models" dialog box contains functionality to select, manage and create test
models.
● "Specification"
The "Specification" tab contains predefined test models as defined by 3GPP.
Predefined test models are supported in downlink mode.
● "User Defined"
The "User Defined" tab contains functionality to manage custom test models.
Custom test models are supported in downlink and uplink mode.
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Configuring I/Q Measurements
To create a custom test model, describe a signal as required and then save it via
the "Test Models" dialog box.
Here, you can also restore custom test models and delete ones you do not need
anymore.
Predefined test models (E-TM)
In case of downlink signals, the 3GPP standard (TS 36.141) already defines several
EUTRA test models (E-TM) for specific test scenarios. These test models are split into
three main groups (E-TM1, E-TM2 and E-TM3) and are defined by the following characteristics.
● single antenna port, single code word, single layer and no precoding
● duration of one frame
● normal cyclic prefix
● localized virtual resource blocks, no intra-subframe hopping for PDSCH
● UE-specific reference signal not used
The data content of the physical channels and signals are defined in the 3GPP standard. Each E-TM is defined for for all bandwidths defined in the standard (1.4 MHz /
3 MHz / 5 MHz / 10 MHz / 15 MHz / 20 MHz).
More information.
Remote command:
MMEMory:LOAD:TMOD:DL on page 125
Channel Bandwidth / Number of Resource Blocks
Specifies the channel bandwidth and number of resource blocks (RB).
The channel bandwidth and number of resource blocks (RB) are interdependent. Currently, the LTE standard recommends six bandwidths (see table below).
The application also calculates the FFT size, sampling rate, occupied bandwidth and
occupied carriers from the channel bandwidth. Those are read only.
Channel Bandwidth [MHz]
1.4
3
5
10
15
20
Number of Resource Blocks
6
15
25
50
75
100
Sample Rate [MHz]
1.92
3.84
7.68
15.36
30.72
30.72
FFT Size
128
256
512
1024
2048
2048
The application shows the currently selected LTE mode (including the bandwidth) in
the channel bar.
Remote command:
CONFigure[:LTE]:DL[:CC<cci>]:BW on page 122
Cyclic Prefix
The cyclic prefix serves as a guard interval between OFDM symbols to avoid interferences. The standard specifies two cyclic prefix modes with a different length each.
The cyclic prefix mode defines the number of OFDM symbols in a slot.
●
Normal
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Configuration
Configuring I/Q Measurements
●
●
A slot contains 7 OFDM symbols.
Extended
A slot contains 6 OFDM symbols.
The extended cyclic prefix is able to cover larger cell sizes with higher delay
spread of the radio channel.
Auto
The application automatically detects the cyclic prefix mode in use.
Remote command:
CONFigure[:LTE]:DL[:CC<cci>]:CYCPrefix on page 122
Configuring TDD Frames
TDD frames contain both uplink and downlink information separated in time with every
subframe being responsible for either uplink or downlink transmission. The standard
specifies several subframe configurations or resource allocations for TDD systems.
TDD UL/DL Allocations ← Configuring TDD Frames
Selects the configuration of the subframes in a radio frame in TDD systems.
The UL/DL configuration (or allocation) defines the way each subframe is used: for
uplink, downlink or if it is a special subframe. The standard specifies seven different
configurations.
Configuration
Subframe Number and Usage
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D
U = uplink
D = downlink
S = special subframe
Remote command:
Subframe: CONFigure[:LTE]:DL[:CC<cci>]:TDD:UDConf on page 124
Conf. of Special Subframe ← Configuring TDD Frames
In combination with the cyclic prefix, the special subframes serve as guard periods for
switches from uplink to downlink. They contain three parts or fields.
● DwPTS
The DwPTS is the downlink part of the special subframe. It is used to transmit
downlink data.
● GP
The guard period makes sure that there are no overlaps of up- and downlink signals during a switch.
● UpPTS
The UpPTS is the uplink part of the special subframe. It is used to transmit uplink
data.
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The length of the three fields is variable. This results in several possible configurations
of the special subframe. The LTE standard defines 10 different configurations for the
special subframe. However, configurations 8 and 9 only work for a normal cyclic prefix.
If you select configurations 8 or 9 using an extended cyclic prefix or automatic detection of the cyclic prefix, the application will show an error message.
Remote command:
Special subframe: CONFigure[:LTE]:DL[:CC<cci>]:TDD:SPSC on page 123
Configuring the Physical Layer Cell Identity
The cell ID, cell identity group and physical layer identity are interdependent parameters. In combination they are responsible for synchronization between network and
user equipment.
The physical layer cell ID identifies a particular radio cell in the LTE network. The cell
identities are divided into 168 unique cell identity groups. Each group consists of 3
physical layer identities. According to
cell
(1)
( 2)
N ID
 3  N ID
 N ID
N(1) = cell identity group, {0...167}
N(2) = physical layer identity, {0...2}
there is a total of 504 different cell IDs.
If you change one of these three parameters, the application automatically updates the
other two.
For automatic detection of the cell ID, turn the "Auto" function on.
Before it can establish a connection, the user equipment must synchronize to the radio
cell it is in. For this purpose, two synchronization signals are transmitted on the downlink. These two signals are reference signals whose content is defined by the "Physical
Layer Identity" and the "Cell Identity Group".
The first signal is one of 3 possible Zadoff-Chu sequences. The sequence that is used
is defined by the physical layer identity. It is part of the P-SYNC.
The second signal is one of 168 unique sequences. The sequence is defined by the
cell identity group. This sequence is part of the S-SYNC.
In addition to the synchronization information, the cell ID also determines
●
●
the cyclic shifts for PCFICH, PHICH and PDCCH mapping,
the frequency shifts of the reference signal.
Remote command:
Cell ID: CONFigure[:LTE]:DL[:CC<cci>]:PLC:CID on page 122
Cell Identity Group (setting): CONFigure[:LTE]:DL[:CC<cci>]:PLC:CIDGroup
on page 123
Cell Identity Group (query): FETCh[:CC<cci>]:PLC:CIDGroup? on page 124
Identity (setting): CONFigure[:LTE]:DL[:CC<cci>]:PLC:PLID on page 123
Identity (query): FETCh[:CC<cci>]:PLC:PLID? on page 124
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4.1.3 Configuring MIMO Setups
MIMO Configuration...................................................................................................... 40
MIMO Configuration
Selects the antenna configuration and test conditions for a MIMO system.
The MIMO configuration selects the number of transmit antennas in the system. 1-,
2-, and 4-antenna configurations are possible.
In setups with multiple antennas, antenna selection defines the antenna you'd like to
test. You can select the antenna to test manually ("Antenna 1...4"menu items) or let the
application decide which antenna to test ("Auto" menu item). The source of the data is
either live data recorded with an instrument or previously recorded data stored in a file.
Antenna 1
Tests antenna 1 only.
Antenna 2
Tests antenna 2 only.
Antenna 3
Tests antenna 3 only.
Antenna 4
Tests antenna 4 only.
Auto
Analyzes the reference signal to select the correct antenna.
Remote command:
MIMO configuration: CONFigure[:LTE]:DL[:CC<cci>]:MIMO:CONFig
on page 126
Antenna selection: CONFigure[:LTE]:DL[:CC<cci>]:MIMO:ASELection
on page 126
4.1.4 Demodulating the PDSCH
The Physical Layer Shared Channel (PDSCH) carries user data, broadcast system
information and paging messages. It is always present in a downlink transmission.
The application allows you to automatically demodulate the PDSCH and detect the
subframe configuration of the signal you are testing.
For more information on manual PDSCH configuration see chapter 4.1.5, "Configuring
PDSCH Subframes", on page 42.
The PDSCH demodulation settings are part of the "PDSCH Settings" tab of the "Signal
Description" dialog box.
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PDSCH Subframe Configuration Detection.................................................................. 41
Auto PDSCH Demodulation.......................................................................................... 41
PDSCH Subframe Configuration Detection
Selects the method of identifying the PDSCH resource allocation.
●
●
●
Off
Uses the user configuration to demodulate the PDSCH subframe. If the user configuration does not match the frame that was measured, a bad EVM will result.
PDCCH protocol
Sets the PDSCH configuration according to the data in the protocol of the PDCCH
DCIs.
When you use this method, the application measures the boosting for each
PDCCH it has detected. The result is displayed in the Channel Decoder Results.
Physical detection
The physical detection is based on power and modulation detection.
Physical detection makes measurements on TDD E-TMs without a 20 ms trigger
signal possible.
More information.
Remote command:
[SENSe][:LTE]:DL:FORMat:PSCD on page 127
Auto PDSCH Demodulation
Turns automatic demodulation of the PDSCH on and off.
When you turn this feature on, the application automatically detects the PDSCH
resource allocation. This is possible by analyzing the protocol information in the
PDCCH or by analyzing the physical signal. The application then writes the results into
the PDSCH Configuration Table.
You can set the way the application identifies the PDSCH resource allocation with
PDSCH Subframe Configuration Detection.
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When you turn off automatic demodulation of the PDSCH, you have to configure the
PDSCH manually. In that case, the application compares the demodulated LTE frame
to the customized configuration. If the "PDSCH Subframe Configuration Detection" is
not turned off, the application analyzes the frame only if both configurations are the
same.
Remote command:
[SENSe][:LTE]:DL:DEMod:AUTO on page 127
4.1.5 Configuring PDSCH Subframes
The application allows you to configure individual subframes that are used to carry the
information of the PDSCH. The PDSCH (Physical Downlink Shared Channel) primarily
carries all general user data. It therefore takes up most of the space in a radio frame.
When you turn "Auto Demodulation" on, the application automatically determines the
subframe configuration for the PDSCH. In the default state, automatic configuration is
on (➙ More information).
Every LTE frame (FDD and TDD) contains 10 subframes. (In TDD systems, some subframes are used by the uplink, however.) Each downlink subframe consists of one or
more (resource) allocations. The application shows the contents for each subframe in
the configuration table. In the configuration table, each row corresponds to one allocation.
If there are any errors or conflicts between allocations in one or more subframes, the
application shows the corrupt subframe in the "Error in Subframes" field, which
appears below the table and is highlighted red if an error occurs. In addition, it shows
the conflicting rows of the configuration table. It does not show the kind of error.
Before you start to work on the contents of each subframe, you should define the number of subframes you want to customize with the "Configurable Subframes" parameter.
The application supports the configuration of up to 40 subframes.
Then you can select a particular subframe that you want to customize in the "Selected
Subframe" field. Enter the number of the subframe (starting with 0). The application
updates the contents of the configuration table to the selected subframe.
Remote command:
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Number of subframes: CONFigure[:LTE]:DL:CSUBframes on page 127
Number of allocations: CONFigure[:LTE]:DL:SUBFrame<subframe>:ALCount
on page 128
●
●
4.1.5.1
PDSCH Allocations................................................................................................. 43
Enhanced Settings..................................................................................................45
PDSCH Allocations
In the default state, each subframe contains one allocation. Add allocations with the
"Used Allocations" parameter. The application expands the configuration table accordingly with one row representing one allocation. You can define a different number of
allocations for each subframe you want to configure and configure up to 110 allocations in every subframe.
The configuration table contains the settings to configure the allocations.
ID/N_RNTI.....................................................................................................................43
Code Word.................................................................................................................... 43
Modulation.....................................................................................................................43
Enhanced Settings........................................................................................................ 44
VRB Gap....................................................................................................................... 44
Number of RB............................................................................................................... 44
Offset RB.......................................................................................................................44
Power............................................................................................................................ 45
Conflict.......................................................................................................................... 45
ID/N_RNTI
Selects the allocation's ID. The ID corresponds to the N_RNTI.
By default, the application assigns consecutive numbers starting with 0.
The ID, or N_RNTI, is the user equipment identifier for the corresponding allocation
and is a number in the range from 0 to 65535. The order of the numbers is irrelevant.
You can combine allocations by assigning the same number more than once. Combining allocations assigns those allocations to the same user. Allocations with the same
N_RNTI share the same modulation scheme and power settings.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:UEID
on page 131
Code Word
Shows the code word of the allocation.
The code word is made up out of two numbers. The first number is the number of the
code word in the allocation. The second number is the total number of code words that
the allocation contains. Thus, a table entry of "1/2" would mean that the row corresponds to code word 1 out of 2 code words in the allocation.
Modulation
Selects the modulation scheme for the corresponding allocation.
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The modulation scheme for the PDSCH is either QPSK, 16QAM, 64QAM or 256QAM.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>[:
CW<Cwnum>]:MODulation on page 132
Enhanced Settings
Opens a dialog box to configure MIMO functionality.
For more information see chapter 4.1.5.2, "Enhanced Settings", on page 45.
VRB Gap
Turns the use of virtual resource blocks (VRB) on and off.
The standard defines two types of VRBs. Localized VRBs and distributed VRBs. While
localized VRBs have a direct mapping to the PRBs, distributed VRBs result in a better
frequency diversity.
Three values of VRB gap are allowed.
● 0 = Localized VRBs are used.
● 1 = Distributed VRBs are used and the first gap is applied.
● 2 = Distributed VRBs are used and the second gap is applied (for channel bandwidths > 50 resource blocks).
The second gap has a smaller size compared to the first gap.
If on, the VRB Gap determines the distribution and mapping of the VRB pairs to the
physical resource blocks (PRB) pairs.
The distribution of the VRBs is performed in a way that consecutive VRBs are
spread over the frequencies and are not mapped to PRBs whose frequencies are
next to each other. Each VRB pair is split into two parts which results in a frequency gap between the two VRB parts. This method corresponds to frequency
hopping on a slot basis.
The information whether localized or distributed VRBs are applied is carried in the
PDCCH. The DCI formats 1A, 1B and 1D provide a special 1-bit flag for this purpose ("Localized / Distributed VRB Assignment"). Another bit in the DCI formats
controls whether the first or second bit is applied.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:GAP
on page 128
Number of RB
Defines the number of resource blocks the allocation covers. The number of resource
blocks defines the size or bandwidth of the allocation.
If you allocate too many resource blocks compared to the bandwidth you have set, the
application will show an error message in the "Conflicts" column and the "Error in Subframes" field.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBCount
on page 131
Offset RB
Sets the resource block at which the allocation begins.
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A wrong offset for any allocation would lead to an overlap of allocations. In that case
the application will show an error message.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBOFfset
on page 131
Power
Sets the boosting of the allocation. Boosting is the allocation's power relative to the reference signal power.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:POWer
on page 128
Conflict
In case of a conflict, the application shows the type of conflict and the ID of the allocations that are affected. Possible conflicts are:
●
bandwidth error (">BW")
A bandwidth error occurs when the number of resource blocks in the subframe
exceeds the bandwidth you have set.
Number of
Allocations = 6
ID=5
ID 4
ID 3
ID 2
ID 1
ID 0
Subframe Bandwidth = 3 MHz or 15 Resource Blocks
●
RB overlap errors
An RB overlap error occurs if one or more allocations overlap. In that case, check if
the length and offset values of the allocations are correct.
Number of
Allocations = 6
5
ID 4
ID 3
ID 2
ID 1
ID 0
Subframe Bandwidth = 3 MHz or 15 Resource Blocks
4.1.5.2
Enhanced Settings
The "Enhanced Settings" contain mostly functionality to configure the precoding
scheme of a physical channel. The application supports several precoding schemes
that you can select from a dropdown menu.
In addition, you can configure PDSCH allocations that use carrier aggregation.
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None..............................................................................................................................46
Transmit Diversity......................................................................................................... 46
Spatial Multiplexing....................................................................................................... 46
Beamforming (UE Spec RS)......................................................................................... 47
Carrier Aggregation.......................................................................................................47
None
Turns off precoding.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding[:SCHeme] on page 130
Transmit Diversity
Turns on precoding for transmit diversity according to 3GPP TS 36.211.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding[:SCHeme] on page 130
Spatial Multiplexing
Turns on precoding for spatial multiplexing according to 3GPP TS 36.211.
If you are using spatial multiplexing, you can also define the number of layers for any
allocation and the codebook index.
The number of layers of an allocation in combination with the number of code words
determines the layer mapping. The available number of layers depends on the number
of transmission antennas. Thus, the maximum number of layers you can select is
eight.
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The codebook index determines the precoding matrix. The available number of indices
depends on the number of transmission antennas in use. The range is from 0 to 15.
The application automatically selects the codebook index if you turn the "Cyclic Delay
Diversity" (CDD) on.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding[:SCHeme] on page 130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:CLMapping on page 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:CBINdex on page 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:CDD on page 129
Beamforming (UE Spec RS)
Turns on the precoding for beamforming.
If you are using beamforming, you can also define the number of layers and codewords (see Spatial Multiplexing), the scrambling identity and the single layer antenna
port.
The mapping of antenna port to the physical antenna is fixed:
● Port 5 and 7: Antenna 1
● Port 8: Antenna 2
● Port 9: Antenna 3
● Port 10: Antenna 4
The scrambling identity (nSCID) is available for antenna ports 7 and 8. It is used to initialize the sequence that generates UE specific reference signals according to 36.211
(section 6.10.3.1).
The single layer antenna port selects the preconfigured antenna port in single layer
beamforming scenarios. Available if the codeword to layer mapping is "1/1".
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding[:SCHeme] on page 130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:CLMapping on page 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:SCID on page 130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:
PRECoding:AP on page 129
Carrier Aggregation
Defines the PDSCH start offset for the selected PDSCH allocation in a system that
uses carrier aggregation.
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For cross-scheduled UEs, the PDSCH start offset for the secondary carrier is usually
not defined for each subframe individually but is constant over several subframes. In
case the control channel region of the secondary component carrier is longer than the
PDSCH start offset you have defined for the primary carrier, PDSCH resource elements might be overwritten by the resource elements of the control channel. Note that
the bit stream result displays labels these resource element with a "#" sign.
Remote command:
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PSOFfset
on page 131
4.1.6 Configuring the Synchronization Signal
The synchronization signal settings contain settings to describe the physical attributes
and structure of the synchronization signal.
The synchronization signal settings are part of the "Advanced Settings" tab of the "Signal Description" dialog box.
P-/S-SYNC Tx Antenna.................................................................................................48
P-SYNC Relative Power............................................................................................... 48
S-SYNC Relative Power............................................................................................... 48
P-/S-SYNC Tx Antenna
Selects the antenna that transmits the synchronization signal (P-SYNC or S-SYNC).
When selecting the antenna, you implicitly select the synchronization method. If the
selected antenna transmits no synchronization signal, the application uses the reference signal to synchronize. Note that automatic cell ID detection is not available if synchronization is based on the reference signal.
Remote command:
CONFigure[:LTE]:DL[:CC<cci>]:SYNC:ANTenna on page 132
P-SYNC Relative Power
Defines the power of the primary synchronization signal (P-SYNC) relative to the reference signal.
Remote command:
CONFigure[:LTE]:DL:SYNC:PPOWer on page 133
S-SYNC Relative Power
Defines the power of the secondary synchronization signal (S-SYNC) relative to the
reference signal.
Remote command:
CONFigure[:LTE]:DL:SYNC:SPOWer on page 133
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4.1.7 Configuring the Reference Signal
The reference signal settings contain settings to describe the physical attributes and
structure of the reference signal.
The reference signal settings are part of the "Advanced Settings" tab of the "Signal
Description" dialog box.
Rel Power (Reference Signal).......................................................................................49
Rel Power (Reference Signal)
Defines the relative power of the reference signal compared to all the other physical
signals and physical channels.
Note that this setting gives you an offset to all other relative power settings.
Remote command:
CONFigure[:LTE]:DL:REFSig:POWer on page 133
4.1.8 Configuring the Positioning Reference Signal
The positioning reference signal settings contain settings to describe the physical
attributes and structure of the positioning reference signal.
The positioning reference signal settings are part of the "Advanced Settings" tab of the
"Signal Description" dialog box.
Present..........................................................................................................................49
Bandwidth..................................................................................................................... 49
Configuration Index....................................................................................................... 50
Num. Subframes (N_PRS)............................................................................................50
Relative Power (Positioning Reference Signal)............................................................ 50
Frame Number Offset................................................................................................... 50
Present
Turns the positioning reference signal on and off.
Remote command:
CONFigure[:LTE]:DL:PRSS:STATe on page 135
Bandwidth
Defines the bandwidth and thus the number of resource blocks the positioning reference signal occupies.
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Note that the PRS bandwidth has to be smaller than the channel bandwidth.
Remote command:
CONFigure[:LTE]:DL:PRSS:BW on page 134
Configuration Index
Defines the PRS Configuration Index IPRS as defined in 3GPP TS 36.211, table
6.10.4.3-1.
Remote command:
CONFigure[:LTE]:DL:PRSS:CI on page 134
Num. Subframes (N_PRS)
Defines the number of consecutive DL subframes in that PRS are transmitted.
Remote command:
CONFigure[:LTE]:DL:PRSS:NPRS on page 134
Relative Power (Positioning Reference Signal)
Defines the power of a PRS resource element in relation to the power of a common
reference signal resource element.
Remote command:
CONFigure[:LTE]:DL:PRSS:POWer on page 134
Frame Number Offset
Defines the system frame number of the current frame that you want to analyze.
Because the positioning reference signal and the CSI reference signal usually have a
periodicity of several frames, for some reference signal configurations is it necessary to
change the expected system frame number of the frame to be analyzed.
Note that if you define the frame number offset for either reference signal, it is automatically defined for both reference signals.
Remote command:
CONFigure[:LTE]:DL:SFNO on page 135
4.1.9 Defining the PDSCH Resource Block Symbol Offset
The PDSCH resource block symbol offset is part of the "Advanced Settings" tab of the
"Signal Description" dialog box.
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PRB Symbol Offset....................................................................................................... 51
PRB Symbol Offset
PRB Symbol Offset specifies the symbol offset of the PDSCH allocations relative to the
subframe start. This setting applies to all subframes in a frame.
With this settings, the number of OFDM symbols used for control channels is defined,
too. For example, if this parameter is set to 2 and the PDCCH is enabled, the number
of OFDM symbols actually used by the PDCCH is 2.
Special control channels like the PCFICH or PHICH require a minimum number of control channel OFDM symbols at the beginning of each subframe. If PRB Symbol Offset
is lower than the required value, the control channel data overwrites some resource
elements of the PDSCH.
If Auto is selected, the Control Region for PDCCH (PRB Symbol Offset) value is detected from the PCFICH. For correct Demodulation of a 3GPP conform PCFICH signal,
the Scrambling of Coded Bits has to be enabled.
Remote command:
CONFigure[:LTE]:DL:PSOFfset on page 142
4.1.10 Configuring the PBCH
The physical broadcast channel (PBCH) carries system information for the user equipment. You can include or exclude the PBCH in the test setup and define the relative
power of this channel.
The PBCH is part of the control channel. The control channel settings are part of the
"Advanced Settings" tab of the "Signal Description" dialog box.
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PBCH Present...............................................................................................................52
PBCH Relative Power................................................................................................... 52
PBCH Present
Includes or excludes the PBCH from the test setup.
Remote command:
CONFigure[:LTE]:DL:PBCH:STAT on page 138
PBCH Relative Power
Defines the power of the PBCH relative to the reference signal.
Remote command:
CONFigure[:LTE]:DL:PBCH:POWer on page 138
4.1.11 Configuring the PCFICH
The physical control format indicator channel (PCFICH) carries information about the
format of the PDCCH. You can include or exclude the PCFICH in the test setup and
define the relative power of this channel.
The PCFICH is part of the control channel. The control channel settings are part of the
"Advanced Settings" tab of the "Signal Description" dialog box.
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PCFICH Present........................................................................................................... 53
PCFICH Relative Power................................................................................................53
PCFICH Present
Includes or excludes the PCFICH from the test setup.
Remote command:
CONFigure[:LTE]:DL:PCFich:STAT on page 139
PCFICH Relative Power
Defines the power of the PCFICH relative to the reference signal.
Remote command:
CONFigure[:LTE]:DL:PCFich:POWer on page 139
4.1.12 Configuring the PHICH
The physical hybrid ARQ indicator channel (PHICH) contains the hybrid ARQ indicator.
The hybrid ARQ indicator contains the acknowledgement / negative acknowledgments
for uplink blocks.
You can set several specific parameters for the PHICH.
The PHICH is part of the control channel. The control channel settings are part of the
"Advanced Settings" tab of the "Signal Description" dialog box.
Turning off the PHICH
If you set the value of the PHICH Ng to Custom and at the same time define "0" PHICH
groups, the PHICH is excluded from the signal.
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PHICH Duration............................................................................................................ 54
PHICH TDD m_i=1 (E-TM)............................................................................................54
PHICH N_g................................................................................................................... 55
PHICH Number of Groups............................................................................................ 55
PHICH Rel Power......................................................................................................... 55
PHICH Duration
Selects the duration of the PHICH. Normal and extended duration are supported.
With a normal duration, all resource element groups of the PHICH are allocated on the
first OFDM symbol.
With an extended duration, the resource element groups of the PHICH are distributed
over three OFDM symbols for a normal subframe or over two symbols within a special
subframe.
If you select Auto, the duration of PHICH is automatically determined and based on the
PBCH decoding results.
Note that you have to turn on the PBCH for an automatic detetemination of the PHICH
duration.
Remote command:
CONFigure[:LTE]:DL:PHICh:DURation on page 140
PHICH TDD m_i=1 (E-TM)
Turns the special setting of the PHICH for the enhanced test models on and off.
The special setting is defined in 36.141 V9.0.0, 6.1.2.6: "For frame structure type 2 the
factor m_i shall not be set as per TS36.211, Table 6.9-1, but instead shall be set to
m_i=1 for all transmitted subframes."
The parameter is available if you have selected TDD.
Remote command:
CONFigure[:LTE]:DL:PHICh:MITM on page 140
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PHICH N_g
Sets the variable Ng.
Ng in combination with the number of resource blocks defines the number of PHICH
groups in a downlink subframe. The standard specifies several values for Ng that you
can select from the dropdown menu.
If you need a customized configuration, you can set the number of PHICH groups in a
subframe by selecting the "Custom" menu item and set a number of PHICH groups
directly with PHICH Number of Groups.
Remote command:
CONFigure[:LTE]:DL:PHICh:NGParameter on page 141
PHICH Number of Groups
Sets the number of PHICH groups contained in a subframe.
To select a number of groups, you have to set the PHICH N_g to "Custom".
Remote command:
CONFigure[:LTE]:DL:PHICh:NOGRoups on page 141
PHICH Rel Power
Defines the power of all PHICHs in a PHICH group relative to the reference signal.
The application measures a separate relative power for each PHICH if Boosting Estimation is on. In that case, the "Rel. Power / dB" result in the Allocation Summary stays
empty, because it refers to the common relative power for all PHICHs. The relative
powers for each PHICH in the group are displayed in the Channel Decoder Results.
Note that the PHICH power results are quantized to 1 dB steps based on the PHICH
relative power, because only a few PHICH symbols are available for boosting estimation.
Example:
The "PHICH Rel Power" is -3.01 dB.
In that case, possible PHICH boostings are -4.01 dB, -3.01 dB, -2.01 dB, etc.
Remote command:
CONFigure[:LTE]:DL:PHICh:POWer on page 141
4.1.13 Configuring the PDCCH
The physical downlink control channel (PDCCH) carries the downlink control information (for example the information about the PDSCH resource allocation).
You can define several specific parameters for the PDCCH.
The PDCCH is part of the control channel. The control channel settings are part of the
"Advanced Settings" tab of the "Signal Description" dialog box.
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PDCCH Format............................................................................................................. 56
Number of PDCCHs......................................................................................................56
PDCCH Rel Power........................................................................................................56
PDCCH Format
Defines the format of the PDCCH (physical downlink control channel).
Note that PDCCH format "-1" is not defined in the standard. This format corresponds to
the transmission of one PDCCH on all available resource element groups. As a special
case for this PDCCH format, the center of the constellation diagram is treated as a
valid constellation point.
Remote command:
CONFigure[:LTE]:DL:PDCCh:FORMat on page 139
Number of PDCCHs
Sets the number of physical downlink control channels.
This parameter is available if the PDCCH format is -1.
Remote command:
CONFigure[:LTE]:DL:PDCCh:NOPD on page 139
PDCCH Rel Power
Defines the power of the PDCCH relative to the reference signal.
Remote command:
CONFigure[:LTE]:DL:PDCCh:POWer on page 140
4.1.14 Configuring the EPDCCH
The enhanced physical downlink control channel (EPDCCH) carries the downlink control information. Compared to the PDCCH, the EPDCCH uses resource blocks normally reserved for the PDSCH.
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Shared resource blocks of PDSCH and EPDCCH
PDSCH allocations overwrite the EPDCCH if they occupy the same resource blocks.
The EPDCCH is always transmitted in an EPDCCH-PRB set. For each cell and user,
you can define one or two EPDCCH-PRB sets. A EPDCCH-PRB set is made up out of
two or more resource blocks that are combined logically.
Note that you have to measure one EPDCCH-PRB set at a time. If you have to measure a signal with more than one EPDCCH-PRB set, you have to configure each set
separately and refresh the I/Q data for each set.
You can define several parameters for the EPDCCH.
EPDCCH PRB Pairs..................................................................................................... 57
EPDCCH Set ID............................................................................................................ 57
EPDCCH Rel Power..................................................................................................... 58
EPDCCH RB Assignment............................................................................................. 58
EPDCCH Localized.......................................................................................................58
EPDCCH PRB Pairs
Selects the number of resource blocks used in an EPDCCH-PRB set.
If you select the "Disabled" item, the EPDCCH is turned off.
For more information see 3GPP TS 36.213 (numberPRBPairs-r11).
Remote command:
CONFigure[:LTE]:DL:EPDCch:NPRB on page 137
EPDCCH Set ID
Defines the EPDCCH set ID.
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The set ID controls the generation of reference symbols for the EPDCCH. For more
information see TS36.211, 6.10.3A.1.
Remote command:
CONFigure[:LTE]:DL:EPDCch:SID on page 138
EPDCCH Rel Power
Defines the power of the EPDCCH relative to the reference signal.
Remote command:
CONFigure[:LTE]:DL:EPDCch:POWer on page 137
EPDCCH RB Assignment
Defines the location of the resource blocks that the EPDCCH is transmitted in.
For more information see 3GPP TS 36.213 (resourceBlockAssignment-r11).
Remote command:
CONFigure[:LTE]:DL:EPDCch:RBASsign on page 138
EPDCCH Localized
Turns localized transmission of the EPDCCH on and off.
Localized transmission is useful for known channel conditions. In that case, the scheduling and MIMO precoding can be optimized.
If the channel conditions are unknown, distributed transmission is used. Distributed
transmission utilizes the frequency diversity in that the information is distributed over
the selected frequency range.
Remote command:
CONFigure[:LTE]:DL:EPDCch:LOCalized on page 137
4.1.15 Configuring Shared Channels
The shared channel characteristics are part of the "Advanced Settings" tab of the "Signal Description" dialog box.
PDSCH Power Ratio..................................................................................................... 58
PDSCH Power Ratio
Selects the PDSCH P_B parameter that defines the cell-specific ratio of rho_B to
rho_A according to 3GPP TS 36.213, table 5.2-1.
The table below shows the resulting values as a function of the number of antennas.
PDSCH P_B
1 Tx antenna
2 and 4 Tx
antennas
0
0.000 dB
0.969 dB
1
-0.969 dB
0.000 dB
2
-2.218 dB
-1.249 dB
3
-3.979 dB
-3.010 dB
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If you select "p_B/p_A=1", the ratio is always 1, regardless of the number of antennas.
Remote command:
CONFigure[:LTE]:DL:PDSCh:PB on page 142
4.1.16 Selecting the Input and Output Source
The application supports several input sources and outputs.
For a comprehensive description of the supported inputs and outputs, please refer to
the documentation of the connected instrument.
●
●
4.1.16.1
RF Input.................................................................................................................. 59
I/Q File Input............................................................................................................59
RF Input
Functions to configure the RF input described elsewhere:
●
"Input Coupling" on page 63
●
"Impedance" on page 63
Note that the actual functions to configure the RF input depend on the configuration of
the connected instrument.
High-Pass Filter 1...3 GHz............................................................................................ 59
YIG-Preselector.............................................................................................................59
High-Pass Filter 1...3 GHz
Activates an additional internal high-pass filter for RF input signals from 1 GHz to
3 GHz. This filter is used to remove the harmonics of the analyzer in order to measure
the harmonics for a DUT, for example.
This function may require an additional hardware option on the connected instrument.
Remote command:
INPut:FILTer:HPASs[:STATe] on page 151
YIG-Preselector
Activates or deactivates the YIG-preselector, if available on the connected instrument.
An internal YIG-preselector at the input of the connected instrument ensures that
image frequencies are rejected. However, this is only possible for a restricted bandwidth. In order to use the maximum bandwidth for signal analysis you can deactivate
the YIG-preselector at the input of the connected instrument, which may lead to imagefrequency display.
Remote command:
INPut:FILTer:YIG[:STATe] on page 151
4.1.16.2
I/Q File Input
Alternatively to "live" data input from a connected instrument, measurement data to be
analyzed by the R&S VSE software can also be provided "offline" by a stored data file.
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This allows you to perform a measurement on any instrument, store the results to a
file, and analyze the stored data partially or as a whole at any time using the R&S VSE
software.
The "Input Source" settings defined in the "Input" dialog box are identical to those configured for a specific channel in the "Measurement Group Setup" window.
I/Q File State................................................................................................................. 60
Input File....................................................................................................................... 60
I/Q File State
Activates input from the selected I/Q data file.
Remote command:
INPut:SELect on page 151
Input File
Specifies the I/Q data file to be used for input.
Select "Select File" to open the "Load I/Q File" dialog box.
4.1.17 Defining the Frequency
Frequency settings define the frequency characteristics of the signal at the RF input.
They are part of the "Frequency" tab of the "Signal Characteristics" dialog box.
Defining the Signal Frequency...................................................................................... 61
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Defining the Signal Frequency
For measurements with an RF input source, you have to match the center frequency
of the analyzer to the frequency of the signal.
The available frequency range depends on the hardware configuration of the analyzer
you are using.
In addition to the frequency itself, you can also define a frequency stepsize. The frequency stepsize defines the extent of a frequency change if you change it for example
with the rotary knob. Define the stepsize in two ways.
●
●
= Center
One frequency step corresponds to the current center frequency.
Manual
Define a any stepsize you need.
Remote command:
Center frequency: [SENSe]:FREQuency:CENTer[:CC<cci>] on page 152
Frequency stepsize: [SENSe:]FREQuency:CENTer:STEP on page 153
Frequency offset: [SENSe]:FREQuency:CENTer[:CC<cci>]:OFFSet
on page 152
4.1.18 Defining Level Characteristics
Amplitude settings define the expected level characteristics of the signal at the RF
input.
Level characteristics are available when you capture data with an instrument. In addition, the functions that are available depend on the configuration of the connected
instrument.
Defining a Reference Level...........................................................................................61
Attenuating the Signal................................................................................................... 62
Input Coupling............................................................................................................... 63
Impedance.................................................................................................................... 63
Defining a Reference Level
The reference level is the power level the analyzer expects at the RF input. Keep in
mind that the power level at the RF input is the peak envelope power in case of signals
with a high crest factor like LTE.
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To get the best dynamic range, you have to set the reference level as low as possible.
At the same time, make sure that the maximum signal level does not exceed the reference level. If it does, it will overload the A/D converter, regardless of the signal power.
Measurement results may deteriorate (e.g. EVM). This applies especially for measurements with more than one active channel near the one you are trying to measure (± 6
MHz).
Note that the signal level at the A/D converter may be stronger than the level the application displays, depending on the current resolution bandwidth. This is because the
resolution bandwidths are implemented digitally after the A/D converter.
You can specify the reference level in several units and define an arithmetic level offset. A level offset is useful if the signal is attenuated or amplified before it is fed into
the analyzer. All displayed power level results will be shifted by this value. Note however, that the reference value ignores the level offset. Thus, it is still mandatory to
define the actual power level that the analyzer has to handle as the reference level.
You can also use automatic detection of the reference level with the "Auto Level"
function.
If active, the application measures and sets the reference level to its ideal value.
Automatic level detection also optimizes RF attenuation.
Remote command:
Manual: DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel on page 154
Automatic: [SENSe:]ADJust:LEVel on page 158
Offset: DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet
on page 155
Unit: CALCulate<n>:UNIT:POWer on page 154
Attenuating the Signal
Attenuation of the signal may become necessary if you have to reduce the power of
the signal that you have applied. Power reduction is necessary, for example, to prevent
an overload of the input mixer.
The LTE measurement application provides several attenuation modes.
●
●
Mechanical (or RF) attenuation is always available. The mechanical attenuator
controls attenuation at the RF input.
Electronic attenuation is available when the connected instrument is equipped
with the corresponding option. Note that the frequency range may not exceed the
specification of the electronic attenuator for it to work.
For both methods, the application provides automatic detection of the ideal attenuation level. Alternatively, you can define the attenuation level manually. The range
is from 0 dB to 79 dB (RF attenuation) or 30 dB (electronic attenuation) in 1 dB
steps.
For more information on attenuating the signal see the manual of the connected instrument.
Remote command:
RF attenuation: INPut:ATTenuation on page 155
Electronic attenuation: INPut<n>:EATT:STATe on page 157
Electronic attenuation: INPut<n>:EATT:AUTO on page 157
Electronic attenuation: INPut<n>:EATT on page 157
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Input Coupling
The RF input of the connected instrument can be coupled by alternating current (AC)
or direct current (DC).
AC coupling blocks any DC voltage from the input signal. This is the default setting to
prevent damage to the instrument. Very low frequencies in the input signal may be distorted.
However, some specifications require DC coupling. In this case, you must protect the
instrument from damaging DC input voltages manually. For details, refer to the data
sheet.
Remote command:
INPut:COUPling on page 156
Impedance
For some measurements, the reference impedance for the measured levels of the connected instrument can be set to 50 Ω or 75 Ω.
75 Ω should be selected if the 50 Ω input impedance is transformed to a higher impedance using a 75 Ω adapter of the RAZ type (= 25 Ω in series to the input impedance
of the instrument). The correction value in this case is 1.76 dB = 10 log (75Ω/50Ω).
This value also affects the unit conversion.
Remote command:
INPut:IMPedance on page 157
4.1.19 Configuring the Data Capture
The data capture settings contain settings that control the data capture.
The data capture settings are part of the "Signal Capture" tab of the "Trigger/Signal
Capture" dialog box.
Capture Time................................................................................................................ 63
Swap I/Q....................................................................................................................... 64
Overall Frame Count.....................................................................................................64
Auto According to Standard.......................................................................................... 64
Number of Frames to Analyze...................................................................................... 64
Maximum Number of Subframes per Frame to Analyze............................................... 65
Capture Time
Defines the capture time.
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The capture time corresponds to the time of one measurement. Hence, it defines the
amount of data the application captures during a single measurement (or sweep).
By default, the application captures 20.1 ms of data to make sure that at least one
complete LTE frame is captured in the measurement.
Remote command:
[SENSe]:SWEep:TIME on page 144
Swap I/Q
Swaps the real (I branch) and the imaginary (Q branch) parts of the signal.
Remote command:
[SENSe]:SWAPiq on page 144
Overall Frame Count
Turns the manual selection of the number of frames to capture (and analyze) on and
off.
If the overall frame count is active, you can define a particular number of frames to
capture and analyze. The measurement runs until all required frames have been analyzed, even if it takes more than one sweep. The results are an average of the captured frames.
If the overall frame count is inactive, the application analyzes all complete LTE frames
currently in the capture buffer.
Remote command:
[SENSe][:LTE]:FRAMe:COUNt:STATe on page 143
Auto According to Standard
Turns automatic selection of the number of frames to capture and analyze on and off.
If active, the application evaluates the number of frames as defined for EVM tests in
the LTE standard.
If inactive, you can set the number of frames you want to analyze.
This parameter is not available if the overall frame count is inactive.
Remote command:
[SENSe][:LTE]:FRAMe:COUNt:AUTO on page 143
Number of Frames to Analyze
Sets the number of frames that you want to capture and analyze.
If the number of frames you have set last longer than a single measurement, the application continues the measurement until all frames have been captured.
The parameter is read only if
●
●
the overall frame count is inactive,
the data is captured according to the standard.
Remote command:
[SENSe][:LTE]:FRAMe:COUNt on page 143
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Maximum Number of Subframes per Frame to Analyze
Selects the maximum number of subframes that the application analyzes and therefore
improves measurement speed.
Reducing the number of analyzed subframes may become necessary if you define a
capture time of less than 20.1 ms. For successful synchronization, all subframes that
you want to analyze must be in the capture buffer. You can make sure that this is the
case by using, for example, an external frame trigger signal.
For maximum measurement speed, the application turns off Auto According to Standard and sets the Number of Frames to Analyze to 1. These settings prevent the application from capturing more than once for a single run measurement.
Remote command:
[SENSe][:LTE]:FRAMe:SCOunt on page 144
4.1.20 Triggering Measurements
The trigger functionality of the LTE measurement application is similar as that of the
connected instrument. The available features depend on the number of data streams
that are captured in the measurement.
For a comprehensive description of the available trigger settings not described here,
please refer to the documentation of the connected instrument.
4.1.20.1
Triggering Single Data Streams
The trigger functionality to capture single data streams is the same as that of the Spectrum application of the instrument you are using. For more information about trigger
functionality, please refer to the documentation of the connected instrument. Note that
the trigger functionality may be different depending on the features that the instrument
you are using supports.
The trigger settings are part of the "Trigger" tab of the "Trigger/Signal Capture" dialog
box.
4.1.21 Estimating Parameters
The parameter estimation settings contain settings that estimate various parameters
during the measurement. They increase the quality of measurement results.
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The parameter estimation settings are part of the "Parameter Estimation / Tracking"
dialog box.
Boosting Estimation...................................................................................................... 66
Channel Estimation....................................................................................................... 66
Boosting Estimation
Turns boosting estimation on and off.
When you turn this eature on, the application automatically sets the relative power settings of all physical channels and the P-/S-SYNC by analyzing the signal.
Remote command:
[SENSe][:LTE]:DL:DEMod:BESTimation on page 149
Channel Estimation
Selects the method of channel estimation.
●
●
●
EVM 3GPP Definition
Channel estimation according to 3GPP TS 36.141. This method is based on averaging in frequency direction and linear interpolation. Examines the reference signal
only.
Optimal, Pilot only
Optimal channel estimation method. Examines the reference signal only.
Optimal, Pilot and Payload
Optimal channel estimation method. Examines both the reference signal and the
payload resource elements.
Remote command:
[SENSe][:LTE]:DL:DEMod:CESTimation on page 149
4.1.22 Compensating Measurement Errors
The tracking settings contain settings that compensate for various common measurement errors that may occur.
The tracking settings are part of the "Parameter Estimation / Tracking" dialog box.
Phase............................................................................................................................ 66
Timing........................................................................................................................... 67
Phase
Specifies whether or not the measurement results should be compensated for common
phase error. When phase compensation is used, the measurement results will be compensated for phase error on a per-symbol basis.
"Off"
Phase tracking is not applied.
"Pilot Only"
Only the reference signal is used for the estimation of the phase
error.
"Pilot and Payload"
Both reference signal and payload resource elements are used for
the estimation of the phase error.
Remote command:
[SENSe][:LTE]:DL:TRACking:PHASe on page 150
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Timing
Specifies whether or not the measurement results should be compensated for timing
error. When timing compensation is used, the measurement results will be compensated for timing error on a per-symbol basis.
Remote command:
[SENSe][:LTE]:DL:TRACking:TIME on page 150
4.1.23 Configuring Demodulation Parameters
Demodulation settings contain settings that describe signal processing and the way the
signal is measured.
Multicarrier Filter........................................................................................................... 67
Compensate Crosstalk..................................................................................................67
Scrambling of Coded Bits..............................................................................................67
Decode All Channels.....................................................................................................68
EVM Calculation Method...............................................................................................68
PDSCH Reference Data............................................................................................... 68
Multicarrier Filter
Turns the suppression of interference of neighboring carriers for tests on multiradio
base stations on and off (e.g. LTE, WCDMA, GSM etc).
Remote command:
[SENSe][:LTE]:DL:DEMod:MCFilter on page 147
Compensate Crosstalk
Turns compensation of crosstalk produced by one of the components in the test setup
on and off.
Turn this feature on, if you expect crosstalk from the DUT or another component in the
test setup. This may be necessary, for example, for over-the-air measurements.
If you connect the DUT to the analyzer by cable, turn off crosstalk compensation. In
that case, the only crosstalk results from the DUT itself and contributes as distortion to
the measurement results.
Remote command:
CONFigure[:LTE]:DL:MIMO:CROSstalk on page 148
Scrambling of Coded Bits
Turns the scrambling of coded bits for all physical channels like PDSCH or PHICH on
and off.
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The scrambling of coded bits affects the bitstream results.
Source of bitstream results when
'Scrambling of coded bits' is
=ON
(unscrambled bits)
=OFF
(scrambled bits)
codewords
layers
Scrambling
Modulation
mapper
Scrambling
Modulation
mapper
[...]
Layer mapper
[...]
Fig. 4-1: Source for bitstream results if scrambling for coded bits is on and off
Remote command:
[SENSe][:LTE]:DL:DEMod:CBSCrambling on page 148
Decode All Channels
Turns the decoding of all physical channels on and off.
When you turn this feature on, the application shows the decoding results in the "Channel Decoder Results" result display.
In addition, the application only measures the EPDCCH resource block that are
actually used.
When you turn the feature off,
● the PBCH is decoded only if the PHICH Duration or the PHICH N_g are automatically determined
● the PDCCH is decoded only if the PDSCH Subframe Configuration Detection is set
to PDCCH protocol.
If decoding of all control channels is off, measurement speed will increase.
Remote command:
[SENSe][:LTE]:DL:DEMod:DACHannels on page 148
EVM Calculation Method
Selects the method to calculate the EVM.
●
●
EVM 3GPP Definition
Calculation of the EVM according to 3GPP TS 36.141. Evaluates the EVM at two
trial timing positions and then uses the maximum EVM of the two.
At Optimal Timing Position
Calculates the EVM using the optimal timing position.
Remote command:
[SENSe][:LTE]:DL:DEMod:EVMCalc on page 148
PDSCH Reference Data
Selects the type of reference data to calculate the EVM for the PDSCH.
●
●
Auto detect
Automatically identifies the reference data for the PDSCH by analyzing the signal.
All 0 (E-TM)
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Sets the PDSCH reference data to a fixed value of 0. This value is according to the
test model definition.
To get valid results, you have to use a DUT that transmits an all-zero data vector.
This setting is a good way if you are expecting signals with a high EVM because
the automatic detection will not be reliable in that case.
Remote command:
[SENSe][:LTE]:DL:DEMod:PRData on page 149
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Analysis
Configuring Tables / Numerical Results
5 Analysis
The application provides several tool for detailed analysis of the captured and measured data.
●
●
●
●
●
Configuring Tables / Numerical Results..................................................................70
Evaluation Range....................................................................................................70
Scale....................................................................................................................... 72
Result Settings........................................................................................................73
Markers................................................................................................................... 74
5.1 Configuring Tables / Numerical Results
The application allows you to customize the number of columns for some numeric
result displays, for example the Allocation Summary.
► Click somewhere in the header row of the table.
The application opens a dialog box to add or remove columns.
5.2 Evaluation Range
The evaluation range defines the signal parts that are considered during signal analysis.
Subframe Selection.......................................................................................................70
Evaluation Range for the Constellation Diagram.......................................................... 71
Subframe Selection
Selects a particular subframe whose results the application displays.
You can select a particular subframe for the following measurements.
● Result Summary
● EVM vs Carrier / EVM vs Symbol / EVM vs Symbol X Carrier
● Channel Flatness / Channel Flatness Difference
● Group Delay
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Evaluation Range
●
●
●
●
Power vs Symbol X Carrier
Constellation Diagram
Allocation Summary
Bit Stream
Selecting "All" either displays the results over all subframes or calculates a statistic
over all subframes that have been analyzed.
Example: Subframe selection
If you select all subframes ("All"), the application shows three traces. One trace shows
the subframe with the minimum level characteristics, the second trace shows the subframe with the maximum level characteristics and the third subframe shows the averaged level characteristics of all subframes.
●
●
●
PK: peak value
AV: average value
MI: minimum value
If you select a specific subframe, the application shows one trace. This trace contains
the results for that subframe only.
Remote command:
[SENSe][:LTE]:SUBFrame:SELect on page 160
Evaluation Range for the Constellation Diagram
The "Evaluation Range" dialog box defines the type of constellation points that are displayed in the Constellation Diagram.
By default the application displays all constellation points of the data that have been
evaluated. However, you can filter the results by several aspects.
●
●
●
●
●
Modulation
Filters the results to include only the selected type of modulation.
Allocation
Filters the results to include only a particular type of allocation.
Symbol
Filters the results to include only a particular OFDM symbol.
Filtering by OFDM symbols is available for constellations created before MIMO
decoding.
Carrier
Filters the results to include only a particular subcarrier.
Filtering by carrier is available for constellations created before MIMO decoding.
Symbol
Filters the results to include only a particular codeword symbol.
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Scale
●
●
Filtering by codeword symbols is available for constellations created after MIMO
decoding.
Codeword
Filters the results to include only a particular codeword.
Filtering by codeword is available for constellations created after MIMO decoding.
Location
Selects the point in the signal processing at which the constellation diagram is created, before or after the MIMO encoding.
Note that the PHICH is CDMA encoded. Thus, the constellation points for the
PHICH are either created before or after CDMA encoding.
If you have selected "After MIMO/CDMA Decoder", filtering by "Symbol" and "Carrier" is not available. Instead, you can filter by "Symbol" and "Codeword".
The result display is updated as soon as you make the changes.
Note that the constellation selection is applied to all windows in split screen mode if the
windows contain constellation diagrams.
Remote command:
Modulation: [SENSe][:LTE]:MODulation:SELect on page 160
Allocation: [SENSe][:LTE]:ALLocation:SELect on page 159
Symbol: [SENSe][:LTE]:SYMBol:SELect on page 161
Carrier: [SENSe][:LTE]:CARRier:SELect on page 159
Location: [SENSe][:LTE]:LOCation:SELect on page 160
5.3 Scale
Y-Axis Scale..................................................................................................................72
Y-Axis Scale
The y-axis scaling determines the vertical resolution of the measurement results. The
scaling you select always applies to the currently active screen and the corresponding
result display.
Usually, the best way to view the results is if they fit ideally in the diagram area in order
to view the complete trace. This is the way the application scales the y-axis if you are
using the automatic scale function.
But it may become necessary to see a more detailed version of the results. In that
case, turn on fixed scaling for the y-axis by defining the minimum and maximum values displayed on the vertical axis. Possible values and units depend on the result display you want to adjust the scale of.
You can restore the default scale at any time with "Restore Scale".
Tip:
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Result Settings
Alternatively, you can scale the windows in the "Auto Set" menu. In addition to scaling
the window currently in focus ("Auto Scale Window"), there you can scale all windows
at the same time ("Auto Scale All").
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:AUTO ONCE on page 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MAXimum on page 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MINimum on page 162
5.4 Result Settings
Result settings define the way certain measurement results are displayed.
EVM Unit....................................................................................................................... 73
Bit Stream Format......................................................................................................... 73
Carrier Axes.................................................................................................................. 74
Subwindow Coupling.....................................................................................................74
Marker Coupling............................................................................................................74
EVM Unit
Selects the unit for graphic and numerical EVM measurement results.
Possible units are dB and %.
Remote command:
UNIT:EVM on page 163
Bit Stream Format
Selects the way the bit stream is displayed.
The bit stream is either a stream of raw bits or of symbols. In case of the symbol format, the bits that belong to a symbol are shown as hexadecimal numbers with two digits.
Examples:
Fig. 5-1: Bit stream display in downlink application if the bit stream format is set to "symbols"
Fig. 5-2: Bit stream display in downlink application if the bit stream format is set to "bits"
Remote command:
UNIT:BSTR on page 162
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Markers
Carrier Axes
Selects the scale of the x-axis for result displays that show results of OFDM subcarriers.
●
X-axis shows the frequency of the subcarrier
●
X-axis shows the number of the subcarrier
Remote command:
UNIT:CAXes on page 163
Subwindow Coupling
Couples or decouples result display tabs (subwindows).
If the coupling is on and you select another tab in a result display, the application automatically selects the same tab for all result displays
Subwindow coupling is available for measurements with multiple data streams (MIMO).
Marker Coupling
Couples or decouples markers that are active in multiple result displays.
When you turn this feature on, the application moves the marker to its new position in
all active result displays.
When you turn it off, you can move the markers in different result displays independent
from each other.
Remote command:
CALCulate:MARKer:COUPling on page 162
5.5 Markers
Markers are available for most of the I/Q measurement result displays. The functionality (setting and positioning) is the same as in the base software.
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Markers
Markers in result displays with a third aspect
In result displays that have a third dimension (EVM vs Symbol x Carrier etc.), you can
position a marker on a particular symbol in a particular carrier.
When you activate a marker, you can select the symbol and carrier you want to position the marker on. Alternatively, you can define the marker position in the "Marker
Configuration" dialog box, which is expanded accordingly.
Fig. 5-3: Marker Configuration dialog, the "Carrier" field is only available for result displays with a
third dimension.
For a comprehensive description of the marker functionality see the corresponding
chapters in the documentation of the connected instrument.
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Overview of Remote Command Suffixes
6 Remote Control
The following remote control commands are required to configure and perform noise
figure measurements in a remote environment. The R&S VSE must already be set up
for remote operation in a network as described in the base unit manual.
Universal functionality
Note that basic tasks that are also performed in the base unit in the same way are not
described here. For a description of such tasks, see the R&S VSE User Manual.
In particular, this includes:
●
Managing Settings and Results, i.e. storing and loading settings and result data.
●
Basic instrument configuration, e.g. checking the system configuration, customizing
the screen layout, or configuring networks and remote operation.
●
Using the common status registers (specific status registers for Pulse measurements are not used).
●
●
●
●
●
●
●
●
●
Overview of Remote Command Suffixes................................................................ 76
Introduction............................................................................................................. 77
Remote Commands to Select the LTE Application................................................. 82
Configuring the Screen Layout................................................................................82
Remote Commands to Read Trace Data................................................................92
Remote Commands to Read Numeric Results..................................................... 105
Remote Commands to Read Limit Check Results................................................114
Remote Commands to Configure the Application................................................. 119
Analysis.................................................................................................................158
6.1 Overview of Remote Command Suffixes
The remote commands for the LTE Measurement application support the following suffixes.
Suffix
Description
<allocation>
Selects an allocation.
<analyzer>
No effect.
<antenna>
Selects an antenna for MIMO measurements.
<cluster>
Selects a cluster (uplink only).
<cwnum>
Selects a codeword.
<k>
Selects a limit line.
Irrelevant for the LTE application.
<m>
Selects a marker.
<n>
Selects a measurement window.
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Suffix
Description
<subframe>
Selects a subframe.
<t>
Selects a trace.
Irrelevant for the LTE application.
6.2 Introduction
Commands are program messages that a controller (e.g. a PC) sends to the instrument or software. They operate its functions ('setting commands' or 'events') and
request information ('query commands'). Some commands can only be used in one
way, others work in two ways (setting and query). If not indicated otherwise, the commands can be used for settings and queries.
The syntax of a SCPI command consists of a header and, in most cases, one or more
parameters. To use a command as a query, you have to append a question mark after
the last header element, even if the command contains a parameter.
A header contains one or more keywords, separated by a colon. Header and parameters are separated by a "white space" (ASCII code 0 to 9, 11 to 32 decimal, e.g. blank).
If there is more than one parameter for a command, these are separated by a comma
from one another.
Only the most important characteristics that you need to know when working with SCPI
commands are described here. For a more complete description, refer to the User
Manual of the R&S VSE.
Remote command examples
Note that some remote command examples mentioned in this general introduction may
not be supported by this particular application.
6.2.1 Conventions used in Descriptions
Note the following conventions used in the remote command descriptions:
●
Command usage
If not specified otherwise, commands can be used both for setting and for querying
parameters.
If a command can be used for setting or querying only, or if it initiates an event, the
usage is stated explicitely.
●
Parameter usage
If not specified otherwise, a parameter can be used to set a value and it is the
result of a query.
Parameters required only for setting are indicated as Setting parameters.
Parameters required only to refine a query are indicated as Query parameters.
Parameters that are only returned as the result of a query are indicated as Return
values.
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Introduction
●
Conformity
Commands that are taken from the SCPI standard are indicated as SCPI confirmed. All commands used by the R&S VSE follow the SCPI syntax rules.
●
Asynchronous commands
A command which does not automatically finish executing before the next command starts executing (overlapping command) is indicated as an Asynchronous
command.
●
Reset values (*RST)
Default parameter values that are used directly after resetting the instrument (*RST
command) are indicated as *RST values, if available.
●
Default unit
This is the unit used for numeric values if no other unit is provided with the parameter.
●
Manual operation
If the result of a remote command can also be achieved in manual operation, a link
to the description is inserted.
6.2.2 Long and Short Form
The keywords have a long and a short form. You can use either the long or the short
form, but no other abbreviations of the keywords.
The short form is emphasized in upper case letters. Note however, that this emphasis
only serves the purpose to distinguish the short from the long form in the manual. For
the instrument, the case does not matter.
Example:
SENSe:FREQuency:CENTer is the same as SENS:FREQ:CENT.
6.2.3 Numeric Suffixes
Some keywords have a numeric suffix if the command can be applied to multiple
instances of an object. In that case, the suffix selects a particular instance (e.g. a measurement window).
Numeric suffixes are indicated by angular brackets (<n>) next to the keyword.
If you don't quote a suffix for keywords that support one, a 1 is assumed.
Example:
DISPlay[:WINDow<1...4>]:ZOOM:STATe enables the zoom in a particular measurement window, selected by the suffix at WINDow.
DISPlay:WINDow4:ZOOM:STATe ON refers to window 4.
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6.2.4 Optional Keywords
Some keywords are optional and are only part of the syntax because of SCPI compliance. You can include them in the header or not.
Note that if an optional keyword has a numeric suffix and you need to use the suffix,
you have to include the optional keyword. Otherwise, the suffix of the missing keyword
is assumed to be the value 1.
Optional keywords are emphasized with square brackets.
Example:
Without a numeric suffix in the optional keyword:
[SENSe:]FREQuency:CENTer is the same as FREQuency:CENTer
With a numeric suffix in the optional keyword:
DISPlay[:WINDow<1...4>]:ZOOM:STATe
DISPlay:ZOOM:STATe ON enables the zoom in window 1 (no suffix).
DISPlay:WINDow4:ZOOM:STATe ON enables the zoom in window 4.
6.2.5 Alternative Keywords
A vertical stroke indicates alternatives for a specific keyword. You can use both keywords to the same effect.
Example:
[SENSe:]BANDwidth|BWIDth[:RESolution]
In the short form without optional keywords, BAND 1MHZ would have the same effect
as BWID 1MHZ.
6.2.6 SCPI Parameters
Many commands feature one or more parameters.
If a command supports more than one parameter, these are separated by a comma.
Example:
LAYout:ADD:WINDow Spectrum,LEFT,MTABle
Parameters may have different forms of values.
●
●
●
●
●
Numeric Values.......................................................................................................80
Boolean...................................................................................................................80
Character Data........................................................................................................81
Character Strings.................................................................................................... 81
Block Data...............................................................................................................81
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6.2.6.1
Numeric Values
Numeric values can be entered in any form, i.e. with sign, decimal point or exponent. In
case of physical quantities, you can also add the unit. If the unit is missing, the command uses the basic unit.
Example:
with unit: SENSe:FREQuency:CENTer 1GHZ
without unit: SENSe:FREQuency:CENTer 1E9 would also set a frequency of 1 GHz.
Values exceeding the resolution of the instrument are rounded up or down.
If the number you have entered is not supported (e.g. in case of discrete steps), the
command returns an error.
Instead of a number, you can also set numeric values with a text parameter in special
cases.
●
MIN/MAX
Defines the minimum or maximum numeric value that is supported.
●
DEF
Defines the default value.
●
UP/DOWN
Increases or decreases the numeric value by one step. The step size depends on
the setting. In some cases you can customize the step size with a corresponding
command.
Querying numeric values
When you query numeric values, the system returns a number. In case of physical
quantities, it applies the basic unit (e.g. Hz in case of frequencies). The number of digits after the decimal point depends on the type of numeric value.
Example:
Setting: SENSe:FREQuency:CENTer 1GHZ
Query: SENSe:FREQuency:CENTer? would return 1E9
In some cases, numeric values may be returned as text.
6.2.6.2
●
INF/NINF
Infinity or negative infinity. Represents the numeric values 9.9E37 or -9.9E37.
●
NAN
Not a number. Represents the numeric value 9.91E37. NAN is returned in case of
errors.
Boolean
Boolean parameters represent two states. The "ON" state (logically true) is represented by "ON" or a numeric value 1. The "OFF" state (logically untrue) is represented by
"OFF" or the numeric value 0.
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Querying boolean parameters
When you query boolean parameters, the system returns either the value 1 ("ON") or
the value 0 ("OFF").
Example:
Setting: DISPlay:WINDow:ZOOM:STATe ON
Query: DISPlay:WINDow:ZOOM:STATe? would return 1
6.2.6.3
Character Data
Character data follows the syntactic rules of keywords. You can enter text using a short
or a long form. For more information see chapter 6.2.2, "Long and Short Form",
on page 78.
Querying text parameters
When you query text parameters, the system returns its short form.
Example:
Setting: SENSe:BANDwidth:RESolution:TYPE NORMal
Query: SENSe:BANDwidth:RESolution:TYPE? would return NORM
6.2.6.4
Character Strings
Strings are alphanumeric characters. They have to be in straight quotation marks. You
can use a single quotation mark ( ' ) or a double quotation mark ( " ).
Example:
INSTRument:DELete 'Spectrum'
6.2.6.5
Block Data
Block data is a format which is suitable for the transmission of large amounts of data.
The ASCII character # introduces the data block. The next number indicates how many
of the following digits describe the length of the data block. In the example the 4 following digits indicate the length to be 5168 bytes. The data bytes follow. During the transmission of these data bytes all end or other control signs are ignored until all bytes are
transmitted. #0 specifies a data block of indefinite length. The use of the indefinite format requires a NL^END message to terminate the data block. This format is useful
when the length of the transmission is not known or if speed or other considerations
prevent segmentation of the data into blocks of definite length.
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Remote Commands to Select the LTE Application
6.3 Remote Commands to Select the LTE Application
INSTrument[:SELect]........................................................................................................82
INSTrument[:SELect] <ChannelType>
This command selects a new measurement channel with the defined channel type.
Parameters:
<ChannelType>
Example:
LTE
LTE measurement channel (R&S VSE-K10x)
INST LTE
Selects the LTE application.
6.4 Configuring the Screen Layout
●
●
●
General Layout........................................................................................................82
Configuring the Layout over all Channels............................................................... 82
Configuring the Layout of a Channel.......................................................................87
6.4.1 General Layout
The following commands are required to configure general window layout, independent
of the application.
Note that the suffix <n> always refers to the window in the currently selected measurement channel.
DISPlay[:WINDow<n>]:SELect.......................................................................................... 82
DISPlay[:WINDow<n>]:SELect
This command sets the focus on the selected result display window.
This window is then the active window.
Example:
DISP:WIND1:SEL
Sets the window 1 active.
Usage:
Setting only
6.4.2 Configuring the Layout over all Channels
The following commands are required to change the evaluation type and rearrange the
screen layout across measurement channels as you do in manual operation.
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Configuring the Screen Layout
For compatibility with other Rohde & Schwarz Signal and Spectrum Analyzers, the layout commands described in chapter 6.4.3, "Configuring the Layout of a Channel",
on page 87 are also supported. Note, however, that the commands described there
only allow you to configure the layout within the active measurement channel.
LAYout:GLOBal:ADD[:WINDow]?...................................................................................... 83
LAYout:GLOBal:CATalog[:WINDow]?................................................................................ 84
LAYout:GLOBal:IDENtify[:WINDow]?................................................................................. 85
LAYout:GLOBal:REMove[:WINDow].................................................................................. 86
LAYout:GLOBal:REPLace[:WINDow]................................................................................. 86
LAYout:GLOBal:ADD[:WINDow]?
<ExChanName>,<ExWinName>,<Direction>,<NewChanName>,<NewWinType>
This command adds a window to the display next to an existing window. The new window may belong to a different channel than the existing window.
To replace an existing window, use the LAYout:GLOBal:REPLace[:WINDow] command.
Parameters:
<ExChanName>
string
Name of an existing channel
<ExWinName>
string
Name of the existing window within the <ExChanName> channel the new window is inserted next to.
By default, the name of a window is the same as its index. To
determine the name and index of all active windows use the
LAYout:GLOBal:IDENtify[:WINDow]? query.
<Direction>
LEFT | RIGHt | ABOVe | BELow | TAB
Direction the new window is added relative to the existing window.
TAB
The new window is added as a new tab in the specified existing
window.
<NewChanName>
string
Name of the channel for which a new window is to be added.
<NewWinType>
string
Type of result display (evaluation method) you want to add.
See the table below for available parameter values.
Return values:
<NewWindowName> When adding a new window, the command returns its name (by
default the same as its number) as a result.
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Example:
LAYout:GLOBal:ADD:WINDow? 'IQ
Analyzer','1',RIGH,'IQ Analyzer2','FREQ'
Adds a new window named 'Spectrum' with a Spectrum display
to the right of window 1 in the channel 'IQ Analyzer'.
Usage:
Query only
Table 6-1: <WindowType> parameter values for LTE Downlink Measurement application
Parameter value
Window type
AISC
Allocation ID vs Symbol X Carrier
ASUM
Allocation Summary
BSTR
Bitstream
CBUF
Capture Buffer
CCDF
CCDF
CDEC
Channel Decoder Results
FLAT
Channel Flatness
CONS
Constellation Diagram
EVCA
EVM vs Carrier
EVRP
EVM vs RB
EVSC
EVM vs Symbol X Carrier
EVSU
EVM vs Subframe
EVSY
EVM vs Symbol
FEVS
Frequency Error vs Symbol
GDEL
Group Delay
MTAB
Marker Table
PSPE
Power Spectrum
PVRP
Power vs RB PDSCH
PVRR
Power vs RB RS
PVSC
Power vs Symbol X Carrier
RSUM
Result Summary
TAL
Time Alignment Error
URWM
UE Specific RS Weights Magnitude
LAYout:GLOBal:CATalog[:WINDow]?
This command queries the name and index of all active windows from top left to bottom right for each active channel. The result is a comma-separated list of values for
each window, with the syntax:
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<ChannelName_1>: <WindowName_1>,<WindowIndex_1>..<WindowName_n>,<WindowIndex_n>
..
<ChannelName_m>: <WindowName_1>,<WindowIndex_1>..<WindowName_n>,<WindowIndex_n>
Return values:
<ChannelName>
<WindowName>
String containing the name of the channel. The channel name is
displayed as the tab label for the measurement channel.
string
Name of the window.
In the default state, the name of the window is its index.
<WindowIndex>
numeric value
Index of the window.
Example:
LAY:GLOB:CAT?
Result:
IQ Analyzer: '1',1,'2',2
Analog Demod: '1',1,'4',4
For the I/Q Analyzer channel, two windows are displayed,
named '2' (at the top or left), and '1' (at the bottom or right).
For the Analog Demodulation channel, two windows are displayed, named '1' (at the top or left), and '4' (at the bottom or
right).
Usage:
Query only
LAYout:GLOBal:IDENtify[:WINDow]? <ChannelName>,<WindowName>
This command queries the index of a particular display window in the specified channel.
Note: to query the name of a particular window, use the LAYout:WINDow<n>:
IDENtify? query.
Parameters:
<ChannelName>
String containing the name of the channel. The channel name is
displayed as the tab label for the measurement channel.
Query parameters:
<WindowName>
String containing the name of a window.
Return values:
<WindowIndex>
Index number of the window.
Example:
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LAYout:GLOBal:ADD:WINDow? IQ,'1',RIGH,
'Spectrum',FREQ
Adds a new window named 'Spectrum' with a Spectrum display
to the right of window 1.
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Example:
LAYout:GLOBal:IDENtify? 'IQ Analyzer',
'Spectrum'
Result:
2
Window index is: 2.
Usage:
Query only
LAYout:GLOBal:REMove[:WINDow] <ChannelName>,<WindowName>
This command removes a window from the display.
Parameters:
<ChannelName>
String containing the name of the channel.
<WindowName>
String containing the name of the window.
Usage:
Event
LAYout:GLOBal:REPLace[:WINDow]
<ExChannelName>,<WindowName>,<NewChannelName>,<WindowType>
This command replaces the window type (for example from "Diagram" to "Result Summary") of an already existing window while keeping its position, index and window
name.
To add a new window, use the LAYout:GLOBal:ADD[:WINDow]? command.
Parameters:
<ExChannelName>
<WindowName>
String containing the name of the channel in which a window is
to be replaced. The channel name is displayed as the tab label
for the measurement channel.
String containing the name of the existing window.
To determine the name and index of all active windows, use the
LAYout:GLOBal:CATalog[:WINDow]? query.
<NewChannelName> String containing the name of the channel for which a new window will be created.
<WindowType>
Type of result display you want to use in the existing window.
Note that the window type must be valid for the specified channel (<NewChannelName>).
See LAYout:ADD[:WINDow]? on page 87 for a list of available window types.
Example:
LAY:GLOB:REPL:WIND 'IQ Analyzer','1',
'AnalogDemod',MTAB
Replaces the I/Q Analyzer result display in window 1 by a
marker table for the AnalogDemod channel.
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6.4.3 Configuring the Layout of a Channel
The following commands are required to change the evaluation type and rearrange the
screen layout for a measurement channel as you do using the SmartGrid in manual
operation. Since the available evaluation types depend on the selected application,
some parameters for the following commands also depend on the selected measurement channel.
Note that the suffix <n> always refers to the window in the currently selected measurement channel.
LAYout:ADD[:WINDow]?...................................................................................................87
LAYout:CATalog[:WINDow]?.............................................................................................89
LAYout:IDENtify[:WINDow]?..............................................................................................89
LAYout:REMove[:WINDow]...............................................................................................90
LAYout:REPLace[:WINDow]..............................................................................................90
LAYout:WINDow<n>:ADD?...............................................................................................91
LAYout:WINDow<n>:IDENtify?..........................................................................................91
LAYout:WINDow<n>:REMove........................................................................................... 92
LAYout:WINDow<n>:REPLace..........................................................................................92
LAYout:ADD[:WINDow]? <WindowName>,<Direction>,<WindowType>
This command adds a window to the display in the active measurement channel.
This command is always used as a query so that you immediately obtain the name of
the new window as a result.
To replace an existing window, use the LAYout:REPLace[:WINDow] command.
Note: Use this command to select a result display instead of CALCulate:FEED (still
supported for compatibilty reasons, but deprecated).
Parameters:
<WindowName>
<Direction>
String containing the name of the existing window the new window is inserted next to.
By default, the name of a window is the same as its index. To
determine the name and index of all active windows, use the
LAYout:CATalog[:WINDow]? query.
LEFT | RIGHt | ABOVe | BELow
Direction the new window is added relative to the existing window.
<WindowType>
text value
Type of result display (evaluation method) you want to add.
See the table below for available parameter values.
Note that the window type must be valid for the active measurement channel. To create a window for a different measurement
channel use the LAYout:GLOBal:REPLace[:WINDow] command.
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Return values:
<NewWindowName> When adding a new window, the command returns its name (by
default the same as its number) as a result.
Example:
LAY:ADD? '1',LEFT,MTAB
Result:
'2'
Adds a new window named '2' with a marker table to the left of
window 1.
Usage:
Query only
Manual operation:
See "Capture Buffer" on page 15
See "EVM vs Carrier" on page 16
See "EVM vs Symbol" on page 17
See "EVM vs RB" on page 18
See "EVM vs Subframe" on page 19
See "Frequency Error vs Symbol" on page 19
See "Power Spectrum" on page 20
See "Power vs Resource Block PDSCH" on page 20
See "Power vs Resource Block RS" on page 21
See "Channel Flatness" on page 21
See "Channel Group Delay" on page 22
See "Channel Flatness Difference" on page 22
See "Constellation Diagram" on page 23
See "CCDF" on page 23
See "Allocation Summary" on page 24
See "Bit Stream" on page 25
See "Channel Decoder Results" on page 25
See "EVM vs Sym x Carr" on page 27
See "Power vs Symbol x Carrier" on page 28
See "Allocation ID vs Symbol x Carrier" on page 28
See "Result Summary" on page 29
See "Marker Table" on page 31
Table 6-2: <WindowType> parameter values for LTE Downlink Measurement application
Parameter value
Window type
AISC
Allocation ID vs Symbol X Carrier
ASUM
Allocation Summary
BSTR
Bitstream
CBUF
Capture Buffer
CCDF
CCDF
CDEC
Channel Decoder Results
FLAT
Channel Flatness
CONS
Constellation Diagram
EVCA
EVM vs Carrier
EVRP
EVM vs RB
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Parameter value
Window type
EVSC
EVM vs Symbol X Carrier
EVSU
EVM vs Subframe
EVSY
EVM vs Symbol
FEVS
Frequency Error vs Symbol
GDEL
Group Delay
MTAB
Marker Table
PSPE
Power Spectrum
PVRP
Power vs RB PDSCH
PVRR
Power vs RB RS
PVSC
Power vs Symbol X Carrier
RSUM
Result Summary
LAYout:CATalog[:WINDow]?
This command queries the name and index of all active windows in the active measurement channel from top left to bottom right. The result is a comma-separated list of
values for each window, with the syntax:
<WindowName_1>,<WindowIndex_1>..<WindowName_n>,<WindowIndex_n>
To query the name and index of all windows in all measurement channels use the
LAYout:GLOBal:CATalog[:WINDow]? command.
Return values:
<WindowName>
string
Name of the window.
In the default state, the name of the window is its index.
<WindowIndex>
numeric value
Index of the window.
Example:
LAY:CAT?
Result:
'2',2,'1',1
Two windows are displayed, named '2' (at the top or left), and '1'
(at the bottom or right).
Usage:
Query only
LAYout:IDENtify[:WINDow]? <WindowName>
This command queries the index of a particular display window in the active measurement channel.
Note: to query the name of a particular window, use the LAYout:WINDow<n>:
IDENtify? query.
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Configuring the Screen Layout
To query the index of a window in a different measurement channel use the LAYout:
GLOBal:IDENtify[:WINDow]? command.
Query parameters:
<WindowName>
String containing the name of a window.
Return values:
<WindowIndex>
Index number of the window.
Example:
LAY:WIND:IDEN? '2'
Queries the index of the result display named '2'.
Response:
2
Usage:
Query only
LAYout:REMove[:WINDow] <WindowName>
This command removes a window from the display in the active measurement channel.
To remove a window for a different measurement channel use the LAYout:GLOBal:
REMove[:WINDow] command.
Parameters:
<WindowName>
String containing the name of the window.
In the default state, the name of the window is its index.
Example:
LAY:REM '2'
Removes the result display in the window named '2'.
Usage:
Event
LAYout:REPLace[:WINDow] <WindowName>,<WindowType>
This command replaces the window type (for example from "Diagram" to "Result Summary") of an already existing window in the active measurement channel while keeping
its position, index and window name.
To add a new window, use the LAYout:ADD[:WINDow]? command.
Parameters:
<WindowName>
<WindowType>
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String containing the name of the existing window.
By default, the name of a window is the same as its index. To
determine the name and index of all active windows in the active
measurement channel, use the LAYout:CATalog[:WINDow]?
query.
Type of result display you want to use in the existing window.
See LAYout:ADD[:WINDow]? on page 87 for a list of available
window types.
Note that the window type must be valid for the active measurement channel. To create a window for a different measurement
channel use the LAYout:GLOBal:REPLace[:WINDow] command.
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Example:
LAY:REPL:WIND '1',MTAB
Replaces the result display in window 1 with a marker table.
LAYout:WINDow<n>:ADD? <Direction>,<WindowType>
This command adds a measurement window to the display. Note that with this command, the suffix <n> determines the existing window next to which the new window is
added, as opposed to LAYout:ADD[:WINDow]?, for which the existing window is
defined by a parameter.
To replace an existing window, use the LAYout:WINDow<n>:REPLace command.
This command is always used as a query so that you immediately obtain the name of
the new window as a result.
Parameters:
<Direction>
<WindowType>
LEFT | RIGHt | ABOVe | BELow
Type of measurement window you want to add.
See LAYout:ADD[:WINDow]? on page 87 for a list of available
window types.
Note that the window type must be valid for the active measurement channel. To create a window for a different measurement
channel use the LAYout:GLOBal:ADD[:WINDow]? command.
Return values:
<NewWindowName> When adding a new window, the command returns its name (by
default the same as its number) as a result.
Example:
LAY:WIND1:ADD? LEFT,MTAB
Result:
'2'
Adds a new window named '2' with a marker table to the left of
window 1.
Usage:
Query only
LAYout:WINDow<n>:IDENtify?
This command queries the name of a particular display window (indicated by the <n>
suffix) in the active measurement channel.
Note: to query the index of a particular window, use the LAYout:IDENtify[:
WINDow]? command.
Return values:
<WindowName>
Example:
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String containing the name of a window.
In the default state, the name of the window is its index.
LAY:WIND2:IDEN?
Queries the name of the result display in window 2.
Response:
'2'
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Usage:
Query only
LAYout:WINDow<n>:REMove
This command removes the window specified by the suffix <n> from the display in the
active measurement channel.
The result of this command is identical to the LAYout:REMove[:WINDow] command.
To remove a window in a different measurement channel use the LAYout:GLOBal:
REMove[:WINDow] command.
Example:
LAY:WIND2:REM
Removes the result display in window 2.
Usage:
Event
LAYout:WINDow<n>:REPLace <WindowType>
This command changes the window type of an existing window (specified by the suffix
<n>) in the active measurement channel.
The result of this command is identical to the LAYout:REPLace[:WINDow] command.
To add a new window, use the LAYout:WINDow<n>:ADD? command.
Parameters:
<WindowType>
Example:
Type of measurement window you want to replace another one
with.
See LAYout:ADD[:WINDow]? on page 87 for a list of available
window types.
Note that the window type must be valid for the active measurement channel. To create a window for a different measurement
channel use the LAYout:GLOBal:REPLace[:WINDow] command.
LAY:WIND2:REPL MTAB
Replaces the result display in window 2 with a marker table.
6.5 Remote Commands to Read Trace Data
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Using the TRACe[:DATA] Command...................................................................... 92
Remote Commands to Read Measurement Results.............................................104
6.5.1 Using the TRACe[:DATA] Command
This chapter contains information on the TRACe:DATA command and a detailed
description of the characteristics of that command.
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The TRACe:DATA command queries the trace data or results of the currently active
measurement or result display. The type, number and structure of the return values are
specific for each result display. In case of results that have any kind of unit, the command returns the results in the unit you have currently set for that result display.
Note also that return values for results that are available for both downlink and uplink
may be different.
For several result displays, the command also supports various SCPI parameters in
combination with the query. If available, each SCPI parameter returns a different
aspect of the results. If SCPI parameters are supported, you have to quote one in the
query.
Example:
TRAC2:DATA? TRACE1
The format of the return values is either in ASCII or binary characters and depends on
the format you have set with FORMat[:DATA].
Following this detailed description, you will find a short summary of the most important
functions of the command (TRACe<n>[:DATA]?).
Selecting a measurement window
Compared to the LTE application on the R&S FSQ or R&S FSV, you have to select the
measurement window directly with the suffix <n> at TRACe. The range of <n> depends
on the number of active measurement windows.
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Allocation ID vs Symbol x Carrier............................................................................94
Allocation Summary................................................................................................ 94
Bit Stream............................................................................................................... 94
Capture Buffer.........................................................................................................95
CCDF...................................................................................................................... 95
Channel Decoder Results....................................................................................... 96
Channel and Spectrum Flatness.............................................................................97
Channel and Spectrum Flatness Difference........................................................... 97
Channel Group Delay..............................................................................................97
Constellation Diagram.............................................................................................98
EVM vs Carrier........................................................................................................98
EVM vs RB..............................................................................................................99
EVM vs Subframe................................................................................................... 99
EVM vs Symbol.......................................................................................................99
EVM vs Symbol x Carrier........................................................................................ 99
Frequency Error vs Symbol...................................................................................100
Power Spectrum....................................................................................................100
Power vs RB RS................................................................................................... 100
Power vs RB PDSCH............................................................................................101
Power vs Symbol x Carrier....................................................................................101
UE RS Weights Magnitude (Difference)................................................................101
Return Value Codes..............................................................................................102
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6.5.1.1
Allocation ID vs Symbol x Carrier
For the Allocation ID vs Symbol x Carrier, the command returns one value for each
resource element.
<ID[Symbol(0),Carrier(1)]>, ..., <ID[Symbol(0),Carrier(n)]>,
<ID[Symbol(1),Carrier(1)]>, ..., <ID[Symbol(1),Carrier(n)]>,
...
<ID[Symbol(n),Carrier(1)]>, ..., <ID[Symbol(n),Carrier(n)]>,
The <allocation ID> is encoded. For the code assignment see chapter 6.5.1.22,
"Return Value Codes", on page 102.
The following parameters are supported.
●
6.5.1.2
TRACE1
Allocation Summary
For the Allocation Summary, the command returns seven values for each line of the
table.
<subframe>, <allocation ID>, <number of RB>, <relative power>,
<modulation>, <absolute power>, <EVM>, ...
The unit for <absolute power> is always dBm. The unit for <relative power> is
always dB. The unit for <EVM> depends on UNIT:EVM. All other values have no unit.
The <allocation ID> and <modulation> are encoded. For the code assignment
see chapter 6.5.1.22, "Return Value Codes", on page 102.
Note that the data format of the return values is always ASCII.
Example:
TRAC:DATA? TRACE1 would return:
0, -5, 0, 0.0000000000000, 2, -45.5463829153428, 7.33728660354122E-05,
0, -3, 0, 0.0073997452251, 6, -42.5581007463452, 2.54197349219455E-05,
0, -4, 0, 0.0052647197362, 1, -42.5464220485716, 2.51485275782241E-05,
...
6.5.1.3
Bit Stream
For the Bit Stream result display, the command returns five values and the bitstream
for each line of the table.
<subframe>, <allocation ID>, <codeword>, <modulation>, <# of
symbols/bits>, <hexadecimal/binary numbers>,...
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All values have no unit. The format of the bitstream depends on Bit Stream Format.
The <allocation ID>, <codeword> and <modulation> are encoded. For the
code assignment see chapter 6.5.1.22, "Return Value Codes", on page 102.
For symbols or bits that are not transmitted, the command returns
●
"FFF" if the bit stream format is "Symbols"
●
"9" if the bit stream format is "Bits".
For symbols or bits that could not be decoded because the number of layer exceeds
the number of receive antennas, the command returns
●
"FFE" if the bit stream format is "Symbols"
●
"8" if the bit stream format is "Bits".
Note that the data format of the return values is always ASCII.
Example:
TRAC:DATA? TRACE1 would return:
0, -12, 0, 2, 0, 01, 01, 00, 02, 03, 00, 01, 02, 01, 02, 01, ...
<continues like this until the next data block starts or the end of data is
reached>
0, -12, 0, 2, 32, 03, 02, 03, 03, 03, 03, 01, 03, 00, 03, ...
6.5.1.4
Capture Buffer
For the Capture Buffer result display, the command returns one value for each I/Q
sample in the capture buffer.
<absolute power>, ...
The unit is always dBm.
The following parameters are supported.
●
6.5.1.5
TRACE1
CCDF
For the CCDF result display, the type of return values depends on the parameter.
●
TRACE1
Returns the probability values (y-axis).
<# of values>, <probability>, ...
The unit is always %.
The first value that is returned is the number of the following values.
●
TRACE2
Returns the corresponding power levels (x-axis).
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<# of values>, <relative power>, ...
The unit is always dB.
The first value that is returned is the number of the following values.
6.5.1.6
Channel Decoder Results
For the Channel Decoder Results, the number and type of return values depend on the
parameter.
●
PBCH
Returns the results for the PBCH if PBCH decoding (or CRC check) was successful. The results are made up out of six values.
<subframe>, <# of antennas>, <system bandwidth>, <frame>,
<PHICH duration>, <PHICH resource>
The unit for <system bandwidth> is Hz. All other values have no unit.
The <PHICH duration> and <PHICH resource> are encoded. For the code
assignment see chapter 6.5.1.22, "Return Value Codes", on page 102.
If PBCH decoding was not successful, the command returns NAN.
●
PCFICH
Returns the results for the PCFICH. The results are made up out of two parameters.
<subframe>, <number of symbols for PDCCH>
The values have no unit.
●
PHICH
Returns the results for the PHICH. The results are made up out of three values for
each line of the table.
<subframe>, <ACK/NACK>, <relative power>
The unit for <relative power> is dB. All other values have no unit.
The <ACK/NACK> is encoded. For the code assignment see chapter 6.5.1.22,
"Return Value Codes", on page 102.
●
PDCCH
Returns the results for the PDCCH. The results are made up out of seven values
for each line of the table.
<subframe>, <RNTI>, <DCI format>, <PDCCH format>, <CCE
offset>, <# of transmitted bits>, [stream of binary numbers]
The values have no unit.
The [stream of binary numbers] is a list of binary numbers separated by
comma.
The <DCI format> and <PDCCH format> are encoded. For the code assignment see chapter 6.5.1.22, "Return Value Codes", on page 102.
●
PDSCH
Returns the results for the PDSCH. The results are made up out of five values for
each line of the table.
<subframe>, <allocationID>, <codeword>, <# of transmitted
bits>, [stream of binary numbers]
The values have no unit.
The [stream of binary numbers] is a list of binary numbers separated by
comma.
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If the PDSCH could not be decoded, the NAN is returned instead of the <# of
transmitted bits>. The [stream of binary numbers] is not shown.
The <allocationID> and <codeword> are encoded. For the code assignment
see chapter 6.5.1.22, "Return Value Codes", on page 102.
6.5.1.7
Channel and Spectrum Flatness
For the Channel Flatness result display, the command returns one value for each trace
point.
<relative power>, ...
The unit is always dB.
The following parameters are supported.
6.5.1.8
●
TRACE1
Returns the average power over all subframes.
●
TRACE2
Returns the minimum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
Returns the maximum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
Channel and Spectrum Flatness Difference
For the Channel Flatness Difference result display, the command returns one value for
each trace point.
<relative power>, ...
The unit is always dB. The number of values depends on the selected LTE bandwidth.
The following parameters are supported.
6.5.1.9
●
TRACE1
Returns the average power over all subframes.
●
TRACE2
Returns the minimum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
Returns the maximum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
Channel Group Delay
For the Channel Group Delay result display, the command returns one value for each
trace point.
<group delay>, ...
The unit is always ns. The number of values depends on the selected LTE bandwidth.
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The following parameters are supported.
●
6.5.1.10
TRACE1
Returns the group delay.
Constellation Diagram
For the Constellation Diagram, the command returns two values for each constellation
point.
<I[SF0][Sym0][Carrier1]>, <Q[SF0][Sym0][Carrier1]>, ..., <I[SF0][Sym0][Carrier(n)]>, <Q[SF0][Sym0][Carrier(n)]>,
<I[SF0][Sym1][Carrier1]>, <Q[SF0][Sym1][Carrier1]>, ..., <I[SF0][Sym1][Carrier(n)]>, <Q[SF0][Sym1][Carrier(n)]>,
<I[SF0][Sym(n)][Carrier1]>, <Q[SF0][Sym(n)][Carrier1]>, ..., <I[SF0][Sym(n)][Carrier(n)]>, <Q[SF0][Sym(n)]
[Carrier(n)]>,
<I[SF1][Sym0][Carrier1]>, <Q[SF1][Sym0][Carrier1]>, ..., <I[SF1][Sym0][Carrier(n)]>, <Q[SF1][Sym0][Carrier(n)]>,
<I[SF1][Sym1][Carrier1]>, <Q[SF1][Sym1][Carrier1]>, ..., <I[SF1][Sym1][Carrier(n)]>, <Q[SF1][Sym1][Carrier(n)]>,
<I[SF(n)][Sym(n)][Carrier1]>, <Q[SF(n)][Sym(n)][Carrier1]>, ..., <I[SF(n)][Sym(n)][Carrier(n)]>, <Q[SF(n)]
[Sym(n)][Carrier(n)]>
With SF = subframe and Sym = symbol of that subframe.
The I and Q values have no unit.
The number of return values depends on the constellation selection. By default, it
returns all resource elements including the DC carrier.
The following parameters are supported.
●
6.5.1.11
TRACE1
Returns all constellation points included in the selection.
EVM vs Carrier
For the EVM vs Carrier result display, the command returns one value for each subcarrier that has been analyzed.
<EVM>, ...
The unit depends on UNIT:EVM.
The following parameters are supported.
●
TRACE1
Returns the average EVM over all subframes
●
TRACE2
Returns the minimum EVM found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
Returns the maximum EVM found over all subframes. If you are analyzing a particular subframe, it returns nothing.
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6.5.1.12
EVM vs RB
For the EVM vs RB result display, the command returns one value for each resource
block that has been analyzed.
<EVM>, ...
The unit depends on UNIT:EVM.
The following parameters are supported.
6.5.1.13
●
TRACE1
Returns the average power for each resource block over all subframes.
●
TRACE2
Returns the minimum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
Returns the maximum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
EVM vs Subframe
For the EVM vs Subframe result display, the command returns one value for each subframe that has been analyzed.
<EVM>, ...
The unit depends on UNIT:EVM.
The following parameters are supported.
●
6.5.1.14
TRACE1
EVM vs Symbol
For the EVM vs Symbol result display, the command returns one value for each OFDM
symbol that has been analyzed.
<EVM>, ...
For measurements on a single subframe, the command returns the symbols of that
subframe only.
The unit depends on UNIT:EVM.
The following parameters are supported.
●
6.5.1.15
TRACE1
EVM vs Symbol x Carrier
For the EVM vs Symbol x Carrier, the command returns one value for each resource
element.
<EVM[Symbol(0),Carrier(1)]>, ..., <EVM[Symbol(0),Carrier(n)]>,
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<EVM[Symbol(1),Carrier(1)]>, ..., <EVM[Symbol(1),Carrier(n)]>,
...
<EVM[Symbol(n),Carrier(1)]>, ..., <EVM[Symbol(n),Carrier(n)]>,
The unit depends on UNIT:EVM.
Resource elements that are unused return NAN.
The following parameters are supported.
●
6.5.1.16
TRACE1
Frequency Error vs Symbol
For the Frequency Error vs Symbol result display, the command returns one value for
each OFDM symbol that has been analyzed.
<frequency error>,...
The unit is always Hz.
The following parameters are supported.
●
6.5.1.17
TRACE1
Power Spectrum
For the Power Spectrum result display, the command returns one value for each trace
point.
<power>,...
The unit is always dBm/Hz.
The following parameters are supported.
●
6.5.1.18
TRACE1
Power vs RB RS
For the Power vs RB RS result display, the command returns one value for each
resource block of the reference signal that has been analyzed.
<absolute power>,...
The unit is always dBm.
The following parameters are supported.
●
TRACE1
Returns the average power over all subframes
●
TRACE2
Returns the minimum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
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Returns the maximum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
6.5.1.19
Power vs RB PDSCH
For the Power vs RB PDSCH result display, the command returns one value for each
resource block of the PDSCH that has been analyzed.
<absolute power>,...
The unit is always dBm.
The following parameters are supported.
6.5.1.20
●
TRACE1
Returns the average power over all subframes
●
TRACE2
Returns the minimum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
●
TRACE3
Returns the maximum power found over all subframes. If you are analyzing a particular subframe, it returns nothing.
Power vs Symbol x Carrier
For the Power vs Symbol x Carrier, the command returns one value for each resource
element.
<P[Symbol(0),Carrier(1)]>, ..., <P[Symbol(0),Carrier(n)]>,
<P[Symbol(1),Carrier(1)]>, ..., <P[Symbol(1),Carrier(n)]>,
...
<P[Symbol(n),Carrier(1)]>, ..., <P[Symbol(n),Carrier(n)]>,
with P = Power of a resource element.
The unit is always dBm.
Resource elements that are unused return NAN.
The following parameters are supported.
●
6.5.1.21
TRACE1
UE RS Weights Magnitude (Difference)
For the UE RS Weights Magnitude result display, the command returns one value for
each subcarrier that has been analyzed.
<Magnitude>, ...
The unit dB.
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The following parameters are supported.
●
6.5.1.22
TRACE1
Returns the magnitude of the measured weights of the reference signal (RS) carriers over one subframe.
Return Value Codes
This chapter contains a list for encoded return values.
<ACK/NACK>
The range is {-1...1}.
●
1 = ACK
●
0 = NACK
●
-1 = DTX
<allocation ID>
Represents the allocation ID. The range is as follows.
●
0 - 65535 = PDSCH
●
-1 = Invalid / not used
●
-2 = All
●
-3 = P-SYNC
●
-4 = S-SYNC
●
-5 = Reference Signal (Antenna 1)
●
-6 = Reference Signal (Antenna 2)
●
-7 = Reference Signal (Antenna 3)
●
-8 = Reference Signal (Antenna 4)
●
-9 = PCFICH
●
-10 = PHICH
●
-11 = PDCCH
●
-12 = PBCH
●
-19 = EPDCCH
●
-20 = EPDCCH DMRS1
●
-21 = EPDCCH DMRS2
●
-1xxxxx = UE Reference Signal (Port 5)
●
-2xxxxx = UE Reference Signal 1 (Port 7, 8, 11, 12)
●
-3xxxxx = UE Reference Signal 2 (Port 9, 10, 13, 14, signals with more than 2 layers)
Note. xxxxx is a placeholder for the ID of the PDSCH.
If the PDSCH has, for example, the ID 22, the return value would be -100022,
-200022 or -300022 (depending on the configuration)
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<DCI format>
Represents the DCI format. The value is a number in the range {0...103}.
●
0 = DCI format 0
●
10 = DCI format 1
●
11 = DCI format 1A
●
12 = DCI format 1B
●
13 = DCI format 1C
●
14 = DCI format 1D
●
20 = DCI format 2
●
21 = DCI format 2A
●
22 = DCI format 2B
●
23 = DCI format 2C
●
24 = DCI format 2D
●
30 = DCI format 3
●
31 = DCI format A
●
103 = DCI format 0/3/3A
<modulation>
Represents the modulation scheme. The range is {0...14}.
●
0 = unrecognized
●
1 = RBPSK
●
2 = QPSK
●
3 = 16QAM
●
4 = 64QAM
●
5 = 8PSK
●
6 = PSK
●
7 = mixed modulation
●
8 = BPSK
●
14 = 256QAM
<number of symbols or bits>
In hexadecimal mode, this represents the number of symbols to be transmitted. In
binary mode, it represents the number of bits to be transmitted.
<PHICH duration>
Represents the PHICH duration. The range is {1...2}.
●
1 = normal
●
2 = extended
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<PHICH resource>
Represents the parameter Ng. The range is {1...4}.
●
1 = Ng 1/6
●
2 = Ng 1/2
●
3 = Ng 1
●
4 = Ng 2
TRACe<n>[:DATA]? <Result>
This command returns the trace data for the current measurement or result display.
For more information see chapter 6.5.1, "Using the TRACe[:DATA] Command",
on page 92.
Query parameters:
<TraceNumber>
TRACE1 | TRACE2 | TRACE3
LIST
PBCH
PCFICH
PHICH
PDCCH
Example:
TRAC2? TRACE1
Queries results of the second measurement window. The type of
data that is returned by the parameter (TRACE1) depends on the
result display shown in measurement window 2.
Usage:
Query only
6.5.2 Remote Commands to Read Measurement Results
FORMat[:DATA].............................................................................................................104
FORMat[:DATA] [<Format>]
This command specifies the data format for the data transmission between the LTE
measurement application and the remote client. Supported formats are ASCII or
REAL32.
Parameters:
<Format>
ASCii | REAL
*RST:
Example:
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ASCii
FORM REAL
The software will send binary data in Real32 data format.
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6.6 Remote Commands to Read Numeric Results
●
●
●
Frame Results.......................................................................................................105
Result for Selection............................................................................................... 106
Marker Table......................................................................................................... 113
6.6.1 Frame Results
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MAXimum?........................................................ 105
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MINimum?......................................................... 105
FETCh[:CC<cci>]:SUMMary:EVM:DSQP[:AVERage]?.......................................................105
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MAXimum?........................................................ 105
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MINimum?..........................................................105
FETCh[:CC<cci>]:SUMMary:EVM:DSST[:AVERage]?....................................................... 105
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MAXimum?........................................................ 106
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MINimum?..........................................................106
FETCh[:CC<cci>]:SUMMary:EVM:DSSF[:AVERage]?....................................................... 106
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSQP[:AVERage]?
This command queries the EVM of all resource elements of the PDSCH with a QPSK
modulation.
Suffix:
<cci>
.
1..2
Return values:
<EVM>
<numeric value>
EVM in % or dB, depending on the unit you have set.
Example:
FETC:SUMM:EVM:DSQP?
Returns the PDSCH QSPK EVM.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSST[:AVERage]?
This command queries the EVM of all resource elements of the PDSCH with a 16QAM
modulation.
Suffix:
<cci>
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Return values:
<EVM>
<numeric value>
EVM in % or dB, depending on the unit you have set.
Example:
FETC:SUMM:EVM:DSST?
Returns the PDSCH 16QAM EVM.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM:DSSF[:AVERage]?
This command queries the EVM of all resource elements of the PDSCH with a 64QAM
modulation.
Suffix:
<cci>
.
1..2
Return values:
<EVM>
<numeric value>
EVM in % or dB, depending on the unit you have set.
Example:
FETC:SUMM:EVM:DSSF?
Returns the PDSCH 64QAM EVM.
Example:
FETC:SUMM:EVM?
Returns the mean value.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
6.6.2 Result for Selection
FETCh[:CC<cci>]:SUMMary:CRESt[:AVERage]?.............................................................. 107
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MAXimum?..........................................................107
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MINimum?...........................................................107
FETCh[:CC<cci>]:SUMMary:EVM[:ALL][:AVERage]?........................................................ 107
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MAXimum?.................................................. 108
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MINimum?................................................... 108
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel[:AVERage]?................................................. 108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MAXimum?..................................................... 108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MINimum?...................................................... 108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal[:AVERage]?.................................................... 108
FETCh[:CC<cci>]:SUMMary:FERRor:MAXimum?............................................................. 109
FETCh[:CC<cci>]:SUMMary:FERRor:MINimum?.............................................................. 109
FETCh[:CC<cci>]:SUMMary:FERRor[:AVERage]?............................................................ 109
FETCh[:CC<cci>]:SUMMary:GIMBalance:MAXimum?....................................................... 109
FETCh[:CC<cci>]:SUMMary:GIMBalance:MINimum?........................................................ 109
FETCh[:CC<cci>]:SUMMary:GIMBalance[:AVERage]?...................................................... 109
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FETCh[:CC<cci>]:SUMMary:IQOFfset:MAXimum?............................................................109
FETCh[:CC<cci>]:SUMMary:IQOFfset:MINimum?............................................................. 109
FETCh[:CC<cci>]:SUMMary:IQOFfset[:AVERage]?...........................................................109
FETCh[:CC<cci>]:SUMMary:OSTP:MAXimum?................................................................ 110
FETCh[:CC<cci>]:SUMMary:OSTP:MINimum?................................................................. 110
FETCh[:CC<cci>]:SUMMary:OSTP[:AVERage]?............................................................... 110
FETCh[:CC<cci>]:SUMMary:POWer:MAXimum?.............................................................. 110
FETCh[:CC<cci>]:SUMMary:POWer:MINimum?............................................................... 110
FETCh[:CC<cci>]:SUMMary:POWer[:AVERage]?............................................................. 110
FETCh[:CC<cci>]:SUMMary:QUADerror:MAXimum?.........................................................111
FETCh[:CC<cci>]:SUMMary:QUADerror:MINimum?.......................................................... 111
FETCh[:CC<cci>]:SUMMary:QUADerror[:AVERage]?........................................................111
FETCh[:CC<cci>]:SUMMary:RSSI:MAXimum?................................................................. 111
FETCh[:CC<cci>]:SUMMary:RSSI:MINimum?...................................................................111
FETCh[:CC<cci>]:SUMMary:RSSI[:AVERage]?................................................................ 111
FETCh[:CC<cci>]:SUMMary:RSTP:MAXimum?................................................................ 111
FETCh[:CC<cci>]:SUMMary:RSTP:MINimum?................................................................. 111
FETCh[:CC<cci>]:SUMMary:RSTP[:AVERage]?............................................................... 111
FETCh[:CC<cci>]:SUMMary:SERRor:MAXimum?............................................................. 112
FETCh[:CC<cci>]:SUMMary:SERRor:MINimum?.............................................................. 112
FETCh[:CC<cci>]:SUMMary:SERRor[:AVERage]?............................................................ 112
FETCh:SUMMary:TFRame?........................................................................................... 112
FETCh[:CC<cci>]:SUMMary:CRESt[:AVERage]?
This command queries the average crest factor as shown in the result summary.
Suffix:
<cci>
.
1..2
Return values:
<CrestFactor>
<numeric value>
Crest Factor in dB.
Example:
FETC:SUMM:CRES?
Returns the current crest factor in dB.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM[:ALL][:AVERage]?
This command queries the EVM of all resource elements.
Suffix:
<cci>
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Return values:
<EVM>
<numeric value>
Minimum, maximum or average EVM, depending on the last
command syntax element.
The unit is % or dB, depending on your selection.
Example:
FETC:SUMM:EVM?
Returns the mean value.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel[:AVERage]?
This command queries the EVM of all physical channel resource elements.
Suffix:
<cci>
.
1..2
Return values:
<EVM>
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MAXimum?
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MINimum?
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal[:AVERage]?
This command queries the EVM of all physical signal resource elements.
Suffix:
<cci>
.
1..2
Return values:
<EVM>
<numeric value>
Minimum, maximum or average EVM, depending on the last
command syntax element.
The unit is % or dB, depending on your selection.
Example:
FETC:SUMM:EVM:PSIG?
Returns the mean value.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
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FETCh[:CC<cci>]:SUMMary:FERRor:MAXimum?
FETCh[:CC<cci>]:SUMMary:FERRor:MINimum?
FETCh[:CC<cci>]:SUMMary:FERRor[:AVERage]?
This command queries the frequency error.
Suffix:
<cci>
.
1..2
Return values:
<FreqError>
<numeric value>
Minimum, maximum or average frequency error, depending on
the last command syntax element.
Default unit: Hz
Example:
FETC:SUMM:FERR?
Returns the average frequency error in Hz.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:GIMBalance:MAXimum?
FETCh[:CC<cci>]:SUMMary:GIMBalance:MINimum?
FETCh[:CC<cci>]:SUMMary:GIMBalance[:AVERage]?
This command queries the I/Q gain imbalance.
Suffix:
<cci>
.
1..2
Return values:
<GainImbalance>
<numeric value>
Minimum, maximum or average I/Q imbalance, depending on
the last command syntax element.
Default unit: dB
Example:
FETC:SUMM:GIMB?
Returns the current gain imbalance in dB.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:IQOFfset:MAXimum?
FETCh[:CC<cci>]:SUMMary:IQOFfset:MINimum?
FETCh[:CC<cci>]:SUMMary:IQOFfset[:AVERage]?
This command queries the I/Q offset.
Suffix:
<cci>
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Return values:
<IQOffset>
<numeric value>
Minimum, maximum or average I/Q offset, depending on the last
command syntax element.
Default unit: dB
Example:
FETC:SUMM:IQOF?
Returns the current IQ-offset in dB
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:OSTP:MAXimum?
FETCh[:CC<cci>]:SUMMary:OSTP:MINimum?
FETCh[:CC<cci>]:SUMMary:OSTP[:AVERage]?
This command queries the OSTP.
Suffix:
<cci>
.
1..2
Return values:
<OSTP>
<numeric value>
Minimum, maximum or average OSTP, depending on the last
command syntax element.
Default unit: dBm
Example:
FETC:SUMM:OSTP?
Returns the current average OSTP value.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:POWer:MAXimum?
FETCh[:CC<cci>]:SUMMary:POWer:MINimum?
FETCh[:CC<cci>]:SUMMary:POWer[:AVERage]?
This command queries the total power.
Suffix:
<cci>
.
1..2
Return values:
<Power>
<numeric value>
Minimum, maximum or average power, depending on the last
command syntax element.
Default unit: dBm
Example:
FETC:SUMM:POW?
Returns the total power in dBm
Usage:
Query only
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Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:QUADerror:MAXimum?
FETCh[:CC<cci>]:SUMMary:QUADerror:MINimum?
FETCh[:CC<cci>]:SUMMary:QUADerror[:AVERage]?
This command queries the quadrature error.
Suffix:
<cci>
.
1..2
Return values:
<QuadError>
<numeric value>
Minimum, maximum or average quadrature error, depending on
the last command syntax element.
Default unit: deg
Example:
FETC:SUMM:QUAD?
Returns the current mean quadrature error in degrees.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:RSSI:MAXimum?
FETCh[:CC<cci>]:SUMMary:RSSI:MINimum?
FETCh[:CC<cci>]:SUMMary:RSSI[:AVERage]?
This command queries the RSSI as shown in the result summary.
Suffix:
<cci>
.
1..2
Return values:
<RSSI>
<numeric value>
Minimum, maximum or average sampling error, depending on
the last command syntax element.
Default unit: dBm
Example:
FETC:SUMM:RSSI?
Queries the average RSSI.
Usage:
Query only
FETCh[:CC<cci>]:SUMMary:RSTP:MAXimum?
FETCh[:CC<cci>]:SUMMary:RSTP:MINimum?
FETCh[:CC<cci>]:SUMMary:RSTP[:AVERage]?
This command queries the RSTP as shown in the result summary.
Suffix:
<cci>
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Return values:
<RSTP>
RSTP in dBm.
Example:
FETC:SUMM:RSTP?
Queries the RSTP.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh[:CC<cci>]:SUMMary:SERRor:MAXimum?
FETCh[:CC<cci>]:SUMMary:SERRor:MINimum?
FETCh[:CC<cci>]:SUMMary:SERRor[:AVERage]?
This command queries the sampling error.
Suffix:
<cci>
.
1..2
Return values:
<SamplingError>
<numeric value>
Minimum, maximum or average sampling error, depending on
the last command syntax element.
Default unit: ppm
Example:
FETC:SUMM:SERR?
Returns the current mean sampling error in ppm.
Usage:
Query only
Manual operation:
See "Result Summary" on page 29
FETCh:SUMMary:TFRame?
This command queries the (sub)frame start offset as shown in the Capture Buffer
result display.
Return values:
<Offset>
Time difference between the (sub)frame start and capture buffer
start.
Default unit: s
Example:
FETC:SUMM:TFR?
Returns the (sub)frame start offset.
Usage:
Query only
Manual operation:
See "Capture Buffer" on page 15
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6.6.3 Marker Table
CALCulate<n>:DELTamarker<m>:X................................................................................ 113
CALCulate<n>:DELTamarker<m>:Y?...............................................................................113
CALCulate<n>:MARKer<m>:X........................................................................................ 113
CALCulate<n>:MARKer<m>:Y?.......................................................................................114
CALCulate<n>:DELTamarker<m>:X <Position>
This command moves a delta marker to a particular coordinate on the x-axis.
If necessary, the command activates the delta marker and positions a reference
marker to the peak power.
Example:
CALC:DELT:X?
Outputs the absolute x-value of delta marker 1.
CALCulate<n>:DELTamarker<m>:Y?
This command queries the relative position of a delta marker on the y-axis.
If necessary, the command activates the delta marker first.
To get a valid result, you have to perform a complete measurement with synchronization to the end of the measurement before reading out the result. This is only possible
for single measurement mode.
The unit depends on the application of the command.
Return values:
<Position>
Position of the delta marker in relation to the reference marker.
Example:
INIT:CONT OFF
Switches to single sweep mode.
INIT;*WAI
Starts a sweep and waits for its end.
CALC:DELT2 ON
Switches on delta marker 2.
CALC:DELT2:Y?
Outputs measurement value of delta marker 2.
Usage:
Query only
CALCulate<n>:MARKer<m>:X <Position>
This command moves a marker to a particular coordinate on the x-axis.
If necessary, the command activates the marker.
If the marker has been used as a delta marker, the command turns it into a normal
marker.
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Parameters:
<Position>
Numeric value that defines the marker position on the x-axis.
Range:
The range depends on the current x-axis range.
Example:
CALC:MARK2:X 1.7MHz
Positions marker 2 to frequency 1.7 MHz.
Manual operation:
See "Marker Table" on page 31
CALCulate<n>:MARKer<m>:Y?
This command queries the position of a marker on the y-axis.
If necessary, the command activates the marker first.
To get a valid result, you have to perform a complete measurement with synchronization to the end of the measurement before reading out the result. This is only possible
for single measurement mode.
Return values:
<Result>
Result at the marker position.
Example:
INIT:CONT OFF
Switches to single measurement mode.
CALC:MARK2 ON
Switches marker 2.
INIT;*WAI
Starts a measurement and waits for the end.
CALC:MARK2:Y?
Outputs the measured value of marker 2.
Usage:
Query only
Manual operation:
See "Marker Table" on page 31
6.7 Remote Commands to Read Limit Check Results
●
Checking Limits for Numerical Result Display...................................................... 114
6.7.1 Checking Limits for Numerical Result Display
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL]:MAXimum:RESult....................................... 115
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL][:AVERage]:RESult?.................................... 115
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP:MAXimum:RESult......................................115
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP[:AVERage]:RESult?...................................115
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF:MAXimum:RESult...................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF[:AVERage]:RESult?................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST:MAXimum:RESult...................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST[:AVERage]:RESult?................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel:MAXimum:RESult................................ 117
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CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel[:AVERage]:RESult?............................. 117
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal:MAXimum:RESult...................................117
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal[:AVERage]:RESult?................................117
CALCulate<n>:LIMit<k>:SUMMary:FERRor:MAXimum:RESult........................................... 117
CALCulate<n>:LIMit<k>:SUMMary:FERRor[:AVERage]:RESult?........................................ 117
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance:MAXimum:RESult.....................................118
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance[:AVERage]:RESult?.................................. 118
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset:MAXimum:RESult..........................................118
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset[:AVERage]:RESult?.......................................118
CALCulate<n>:LIMit<k>:SUMMary:QUADerror:MAXimum:RESult...................................... 119
CALCulate<n>:LIMit<k>:SUMMary:QUADerror[:AVERage]:RESult?....................................119
CALCulate<n>:LIMit<k>:SUMMary:SERRor:MAXimum:RESult...........................................119
CALCulate<n>:LIMit<k>:SUMMary:SERRor[:AVERage]:RESult?........................................ 119
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL]:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL][:AVERage]:RESult?
This command queries the results of the EVM limit check of all resource elements.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:EVM:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP[:AVERage]:RESult?
This command queries the results of the EVM limit check of all PDSCH resource elements with a QPSK modulation.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
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Example:
CALC:LIM:SUMM:EVM:DSQP:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF[:AVERage]:RESult?
This command queries the results of the EVM limit check of all PDSCH resource elements with a 64QAM modulation.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:EVM:DSSF:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST[:AVERage]:RESult?
This command queries the results of the EVM limit check of all PDSCH resource elements with a 16QAM modulation.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:EVM:DSST:RES?
Queries the limit check.
Usage:
Query only
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CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel[:AVERage]:RESult?
This command queries the results of the EVM limit check of all physical channel
resource elements.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:EVM:PCH:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal[:AVERage]:RESult?
This command queries the results of the EVM limit check of all physical signal resource
elements.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:EVM:PSIG:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:FERRor:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:FERRor[:AVERage]:RESult?
This command queries the result of the frequency error limit check.
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Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:SERR:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance[:AVERage]:RESult?
This command queries the result of the gain imbalance limit check.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:GIMB:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset[:AVERage]:RESult?
This command queries the result of the I/Q offset limit check.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
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Example:
CALC:LIM:SUMM:IQOF:MAX:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:QUADerror:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:QUADerror[:AVERage]:RESult?
This command queries the result of the quadrature error limit check.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:QUAD:RES?
Queries the limit check.
Usage:
Query only
CALCulate<n>:LIMit<k>:SUMMary:SERRor:MAXimum:RESult
CALCulate<n>:LIMit<k>:SUMMary:SERRor[:AVERage]:RESult?
This command queries the results of the sampling error limit check.
Return values:
<LimitCheck>
The type of limit (average or maximum) that is queried depends
on the last syntax element.
FAILED
Limit check has failed.
PASSED
Limit check has passed.
NOTEVALUATED
Limits have not been evaluated.
Example:
CALC:LIM:SUMM:SERR:RES?
Queries the limit check.
Usage:
Query only
6.8 Remote Commands to Configure the Application
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General Configuration...........................................................................................120
Configuring I/Q Measurements............................................................................. 120
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6.8.1 General Configuration
The following remote control command control general configration of the application.
The remote control commands to select the result displays for I/Q measurements are
described in chapter 6.4, "Configuring the Screen Layout", on page 82.
CONFigure[:LTE]:MEASurement..................................................................................... 120
MMEMory:LOAD:IQ:STATe............................................................................................ 120
SYSTem:PRESet:CHANnel[:EXECute]............................................................................ 120
CONFigure[:LTE]:MEASurement <Measurement>
This command selects the measurement.
Parameters:
<Measurement>
EVM
Selects I/Q measurements with the "EVM" display configuration.
Example:
CONF:MEAS ACLR
Selects the ACLR measurement.
Manual operation:
See "Select Measurement" on page 35
MMEMory:LOAD:IQ:STATe <Path>
This command restores I/Q data from a file.
Setting parameters:
<Path>
String containing the path and name of the source file.
Usage:
Setting only
SYSTem:PRESet:CHANnel[:EXECute]
This command restores the default software settings in the current channel.
Use INST:SEL to select the channel.
Example:
INST 'Spectrum2'
Selects the channel for "Spectrum2".
SYST:PRES:CHAN:EXEC
Restores the factory default settings to the "Spectrum2" channel.
Usage:
Event
Manual operation:
See "Preset Channel" on page 35
6.8.2 Configuring I/Q Measurements
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Signal Description................................................................................................. 121
Signal Capture...................................................................................................... 142
Demodulation........................................................................................................147
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●
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●
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6.8.2.1
Parameter Estimation............................................................................................149
Configuring Inputs and Outputs............................................................................ 150
Defining the Frequency......................................................................................... 152
Configuring Amplitude Characteristics.................................................................. 154
Signal Description
●
●
●
●
●
●
●
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Signal Characteristics........................................................................................... 121
MIMO Setup.......................................................................................................... 126
PDSCH Settings....................................................................................................126
Synchronization Signal..........................................................................................132
Reference Signal...................................................................................................133
Positioning Reference Signal................................................................................ 133
CSI Reference Signal............................................................................................135
Control Channel.................................................................................................... 137
Shared Channel.................................................................................................... 142
Signal Characteristics
CONFigure[:LTE]:DUPLexing.......................................................................................... 121
CONFigure[:LTE]:DL[:CC<cci>]:BW................................................................................. 122
CONFigure[:LTE]:DL[:CC<cci>]:CYCPrefix....................................................................... 122
CONFigure[:LTE]:DL[:CC<cci>]:PLC:CID......................................................................... 122
CONFigure[:LTE]:DL[:CC<cci>]:PLC:CIDGroup................................................................ 123
CONFigure[:LTE]:DL[:CC<cci>]:PLC:PLID........................................................................123
CONFigure[:LTE]:DL[:CC<cci>]:TDD:SPSC......................................................................123
CONFigure[:LTE]:DL[:CC<cci>]:TDD:UDConf................................................................... 124
CONFigure[:LTE]:LDIRection.......................................................................................... 124
FETCh[:CC<cci>]:PLC:CIDGroup?.................................................................................. 124
FETCh[:CC<cci>]:PLC:PLID?..........................................................................................124
MMEMory:LOAD:DEModsetting.......................................................................................125
MMEMory:LOAD:TMOD:DL............................................................................................ 125
CONFigure[:LTE]:DUPLexing <Duplexing>
This command selects the duplexing mode.
Parameters:
<Duplexing>
TDD
Time division duplex
FDD
Frequency division duplex
*RST:
FDD
Example:
CONF:DUPL TDD
Activates time division duplex.
Manual operation:
See "Selecting the LTE Mode" on page 36
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CONFigure[:LTE]:DL[:CC<cci>]:BW <Bandwidth>
This command selects the channel bandwidth.
Parameters:
<Bandwidth>
BW1_40 | BW3_00 | BW5_00 | BW10_00 | BW15_00 |
BW20_00
*RST:
BW10_00
Example:
Single carrier measurement:
CONF:DL:BW BW1_40
Defines a channel bandwidth of 1.4 MHz.
Manual operation:
See "Channel Bandwidth / Number of Resource Blocks"
on page 37
CONFigure[:LTE]:DL[:CC<cci>]:CYCPrefix <PrefixLength>
This command selects the cyclic prefix.
Parameters:
<PrefixLength>
NORM
Normal cyclic prefix length
EXT
Extended cyclic prefix length
AUTO
Automatic cyclic prefix length detection
*RST:
AUTO
Example:
Single carrier measurements:
CONF:DL:CYCP EXT
Selects an extended cyclic prefix.
Manual operation:
See "Cyclic Prefix" on page 37
CONFigure[:LTE]:DL[:CC<cci>]:PLC:CID <CellId>
This command defines the cell ID.
Parameters:
<CellId>
AUTO
Automatically defines the cell ID.
<numeric value>
Number of the cell ID.
Range:
0 to 503
Example:
CONF:NOCC 2
CONF:DL:CC1:PLC:CID 12
CONF:DL:CC2:PLC:CID 15
Selects 2 carriers and defines a cell ID for each one.
Manual operation:
See "Configuring the Physical Layer Cell Identity" on page 39
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CONFigure[:LTE]:DL[:CC<cci>]:PLC:CIDGroup <GroupNumber>
This command selects the cell ID group for downlink signals.
Parameters:
<GroupNumber>
AUTO
Automatic selection
0...167
Manual selection
*RST:
AUTO
Example:
CONF:DL:PLC:CIDG 134
Cell identity group number 134 is selected
CONF:DL:PLC:CIDG AUTO
Automatic cell identity group detection is selected
Manual operation:
See "Configuring the Physical Layer Cell Identity" on page 39
CONFigure[:LTE]:DL[:CC<cci>]:PLC:PLID <Identity>
This command defines the physical layer cell identity for ownlink signals.
Parameters:
<Identity>
AUTO
Automatic selection
0...2
Manual selection
*RST:
AUTO
Example:
CONF:DL:PLC:PLID 1
Selects physical layer cell ID 2.
Manual operation:
See "Configuring the Physical Layer Cell Identity" on page 39
CONFigure[:LTE]:DL[:CC<cci>]:TDD:SPSC <Configuration>
This command selects the special TDD subframe configuration.
Parameters:
<Configuration>
<numeric value>
Numeric value that defines the subframe configuration.
Subframe configurations 7 and 8 are only available if the cyclic
prefix is normal.
Range:
*RST:
Example:
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0
Single carrier measurements:
CONF:DL:CYCP NORM
CONF:DL:TDD:SPSC 7
Selects subframe configuration 7, available only with a normal
cyclic prefix.
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Manual operation:
See "Conf. of Special Subframe" on page 38
CONFigure[:LTE]:DL[:CC<cci>]:TDD:UDConf <Configuration>
This command selects the subframe configuration for TDD signals.
Parameters:
<Configuration>
Range:
*RST:
0 to 6
0
Example:
Single carrier measurements:
CONF:DL:TDD:UDC 4
Selects allocation configuration number 4.
Manual operation:
See "TDD UL/DL Allocations" on page 38
CONFigure[:LTE]:LDIRection <Direction>
This command selects the link direction
Parameters:
<Direction>
DL
Downlink
UL
Uplink
Example:
CONF:LDIR DL
EUTRA/LTE option is configured to analyze downlink signals.
Manual operation:
See "Selecting the LTE Mode" on page 36
FETCh[:CC<cci>]:PLC:CIDGroup?
This command queries the cell identity group that has been detected.
Return values:
<CidGroup>
The command returns -1 if no valid result has been detected yet.
Range:
0 to 167
Example:
FETC:PLC:CIDG?
Returns the current cell identity group.
Usage:
Query only
Manual operation:
See "Configuring the Physical Layer Cell Identity" on page 39
FETCh[:CC<cci>]:PLC:PLID?
This command queries the cell identity that has been detected.
Return values:
<Identity>
The command returns -1 if no valid result has been detected yet.
Range:
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Example:
FETC:PLC:PLID?
Returns the current cell identity.
Usage:
Query only
Manual operation:
See "Configuring the Physical Layer Cell Identity" on page 39
MMEMory:LOAD:DEModsetting <Path>
This command restores previously saved demodulation settings.
The file must be of type "*.allocation" and depends on the link direction that was currently selected when the file was saved. You can load only files with correct link directions.
Setting parameters:
<Path>
String containing the path and name of the file.
Example:
MMEM:LOAD:DEM 'D:\USER\Settingsfile.allocation'
Usage:
Setting only
MMEMory:LOAD:TMOD:DL <TestModel>
This command loads an EUTRA test model (E-TM).
The test models are in accordance with 3GPP TS 36.141.
Setting parameters:
<TestModel>
'E-TM1_1__20MHz'
EUTRA Test Model 1.1 (E-TM1.1)
'E-TM1_2__20MHz'
EUTRA Test Model 1.2 (E-TM1.2)
'E-TM2__20MHz'
EUTRA Test Model 2 (E-TM2)
'E-TM3_1__20MHz'
EUTRA Test Model 3.1 (E-TM3.1)
'E-TM3_2__20MHz'
EUTRA Test Model 3.2 (E-TM3.2)
'E-TM3_3__20MHz'
EUTRA Test Model 3.3 (E-TM3.3)
To select a test model for a different bandwidth, replace
"20MHz" with either "1_4MHz", "3MHz", "5MHz", "10MHz" or
"15MHz".
Example:
MMEM:LOAD:TMOD:DL 'E-TM2__10MHz'
Selects test model 2 for a 10 MHz bandwidth.
Usage:
Setting only
Manual operation:
See "Using Test Models" on page 36
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MIMO Setup
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:ASELection............................................................126
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:CONFig.................................................................126
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:ASELection <Antenna>
This command selects the antenna for measurements with MIMO setups.
Parameters:
<Antenna>
ANT1 | ANT2 | ANT3 | ANT4
Select a single antenna to be analyzed
AUTO
Automatically selects the antenna(s) to be analyzed.
*RST:
ANT1
Example:
CONF:DL:MIMO:CONF TX2
CONF:DL:MIMO:ASEL ANT2
Selects a setup with two antennas and tests antenna number
two.
Manual operation:
See "MIMO Configuration" on page 40
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:CONFig <NofAntennas>
This command sets the number of antennas in the MIMO setup.
Parameters:
<NofAntennas>
TX1
Use one Tx-antenna
TX2
Use two Tx-antennas
TX4
Use four Tx-antennas
*RST:
TX1
Example:
CONF:DL:MIMO:CONF TX2
TX configuration with two antennas is selected.
Manual operation:
See "MIMO Configuration" on page 40
PDSCH Settings
[SENSe][:LTE]:DL:FORMat:PSCD................................................................................... 127
[SENSe][:LTE]:DL:DEMod:AUTO.....................................................................................127
CONFigure[:LTE]:DL:CSUBframes.................................................................................. 127
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALCount...................................................... 128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:GAP.................................128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:POWer............................. 128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:AP................. 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CBINdex.........129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CDD...............129
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CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CLMapping..... 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:SCID.............. 130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding[:SCHeme].......130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PSOFfset......................... 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBCount.......................... 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBOFfset......................... 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:UEID................................131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>[:CW<Cwnum>]:
MODulation......................................................................................................... 132
[SENSe][:LTE]:DL:FORMat:PSCD <Format>
This command selects the method of identifying the PDSCH resource allocation.
Parameters:
<Format>
OFF
Applies the user configuration of the PDSCH subframe regardless of the signal characteristics.
PDCCH
Identifies the configuration according to the data in the PDCCH
DCIs.
PHYDET
Manual PDSCH configuration: analysis only if the actual subframe configuration matches the configured one.
Automatic PDSCH configuration: physical detection of the configuration.
*RST:
PHYD
Example:
DL:FORM:PSCD OFF
Applies the user configuration and does not check the received
signal
Manual operation:
See "PDSCH Subframe Configuration Detection" on page 41
[SENSe][:LTE]:DL:DEMod:AUTO <State>
This command turns automatic demodulation for downlink signals on and off.
Parameters:
<State>
ON | OFF
*RST:
ON
Example:
DL:DEM:AUTO ON
Activates the auto-demodulation for DL.
Manual operation:
See "Auto PDSCH Demodulation" on page 41
CONFigure[:LTE]:DL:CSUBframes <NofSubframes>
This command selects the number of configurable subframes in the downlink signal.
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Parameters:
<NofSubframes>
Example:
Range:
*RST:
0 to 39
1
CONF:DL:CSUB 5
Sets the number of configurable subframes to 5.
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALCount <NofAllocations>
This command defines the number of allocations in a downlink subframe.
Parameters:
<NofAllocations>
<numeric value>
*RST:
Example:
1
CONF:DL:SUBF2:ALC 5
Defines 5 allocations for subframe 2.
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:GAP <VRBGap>
This command turns the VRB Gap on and off.
Parameters:
<VRBGap>
0
Selects localized VRBs
1
Selects distributed VRBs and applies the first gap
2
Selects distributed VRBs and applies the second gap (for channel bandwidths > 50 resource blocks)
*RST:
0
Example:
CONF:DL:SUBF2:ALL5:GAP 0
Selects localized VRBs for allocation 5 in subframe 2.
Manual operation:
See "VRB Gap" on page 44
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:POWer <Power>
This command defines the (relative) power of an allocation in a downlink subframe.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:SUBF2:ALL5:POW -1.3
Defines a relative power of 1.3 dB for allocation 5 in subframe 2.
Manual operation:
See "Power" on page 45
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CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:AP
<Port>
This command selects the antenna port for the beamforming scheme.
The command is available for measurements on a single antenna.
Parameters:
<Port>
5|7|8
Example:
CONF:DL:SUBF2:ALL3:PREC:AP 5
Selects antenna port 5 for beamforming in allocation 3 in subframe 2.
Manual operation:
See "Beamforming (UE Spec RS)" on page 47
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:
CBINdex <CBIndex>
This command selects the codebook index for an allocation with spatial multiplexing
precoding scheme.
Parameters:
<CBIndex>
0...15
*RST:
1
Example:
CONF:DL:SUBF2:ALL4:PREC:CBIN 3
Selects codebook index 3 for allocation 4 in subframe number 2.
Manual operation:
See "Spatial Multiplexing" on page 46
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:
CDD <State>
This command turns the cyclic delay diversity of an allocation with spatial multiplexing
precoding scheme on and off.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
CONF:DL:SUBF2:ALL3:PREC:CDD ON
Turns the cylic delay diversity for allocation 3 in subframe 2 on.
Manual operation:
See "Spatial Multiplexing" on page 46
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:
CLMapping <Mapping>
This command selects the codeword to layer mapping.
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Parameters:
<Mapping>
LC11 | LC21 | LC31 | LC41 | LC22 | LC32 | LC42 | LC52 | LC62 |
LC72 | LC82
Example:
CONF:DL:SUBF2:ALL3:PREC:CLM LC11
Assigns codeword-to-layer mapping 1/1 to allocation 3 in subframe 2.
Manual operation:
See "Spatial Multiplexing" on page 46
See "Beamforming (UE Spec RS)" on page 47
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:
SCID <ID>
This command selects the scrambling identity (nSCID).
The command is available for antenna ports 7 and 8.
Parameters:
<ID>
0|1
Example:
CONF:DL:SUBF2:ALL4:PREC:SCID 1
Selects scrambling identity 1 for allocation 4 in subframe 2.
Manual operation:
See "Beamforming (UE Spec RS)" on page 47
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding[:
SCHeme] <Scheme>
This command selects the precoding scheme of an allocation.
Parameters:
<Scheme>
NONE
Do not use a precoding scheme.
BF
Use beamforming scheme.
SPM
Use spatial multiplexing scheme.
TXD
Use transmit diversity scheme.
*RST:
NONE
Example:
CONF:DL:SUBF2:ALL3:PREC:SCH SPM
Selects the spatial multiplexing precoding scheme for allocation
3 in subframe 2.
Manual operation:
See "None" on page 46
See "Transmit Diversity" on page 46
See "Spatial Multiplexing" on page 46
See "Beamforming (UE Spec RS)" on page 47
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CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PSOFfset
<PSOFfset>
This command defines the PDSCH start offset for a particular PDSCH allocation.
Parameters:
<PSOFfset>
<numeric value>
Number between 0 and 4.
COMM
Common PDSCH start offset.
Example:
CONF:DL:SUBF2:ALL2:PSOF 0
Defines a PDSCH start offset of 0 for the 2nd allocation in the
2nd subframe.
Manual operation:
See "Carrier Aggregation" on page 47
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBCount
<ResourceBlocks>
This command selects the number of resource blocks of an allocation in a downlink
subframe.
Parameters:
<ResourceBlocks>
<numeric value>
*RST:
6
Example:
CONF:DL:SUBF2:ALL5:RBC 25
Defines 25 resource block for allocation 5 in subframe 2.
Manual operation:
See "Number of RB" on page 44
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBOFfset
<Offset>
This command defines the resource block offset of an allocation in a downlink subframe.
Parameters:
<Offset>
<numeric value>
*RST:
0
Example:
CONF:DL:SUBF2:ALL5:RBOF 3
Defines a resource block offset of 3 for allocation 5 in subframe
2.
Manual operation:
See "Offset RB" on page 44
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:UEID <ID>
This command defines the ID or N_RNTI.
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Parameters:
<ID>
ID of the user equipment.
Example:
CONF:DL:SUBF2:ALL5:UEID 5
Assigns the ID 5 to allocation 5 in subframe 2.
Manual operation:
See "ID/N_RNTI" on page 43
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>[:CW<Cwnum>]:
MODulation <Modulation>
This command selects the modulation of an allocation in a downlink subframe.
Suffix:
<Cwnum>
Parameters:
<Modulation>
.
1..n
Selects the codeword.
QPSK
QPSK modulation
QAM16
16QAM modulation
QAM64
64QAM modulation
*RST:
QPSK
Example:
CONF:DL:SUBF2:ALL5:CW2:MOD QAM64
Selects a 64QAM modulation for the second codeword of allocation 5 in subframe 2.
Manual operation:
See "Modulation" on page 43
Synchronization Signal
CONFigure[:LTE]:DL[:CC<cci>]:SYNC:ANTenna...............................................................132
CONFigure[:LTE]:DL:SYNC:PPOWer...............................................................................133
CONFigure[:LTE]:DL:SYNC:SPOWer...............................................................................133
CONFigure[:LTE]:DL[:CC<cci>]:SYNC:ANTenna <Antenna>
This command selects the antenna that transmits the P-SYNC and the S-SYNC.
Parameters:
<Antenna>
ANT1 | ANT2 | ANT3 | ANT4 | ALL | NONE
*RST:
ALL
Example:
CONF:DL:SYNC:ANT ALL
All antennas are used to transmit the P-SYNC and S-SYNC.
Manual operation:
See "P-/S-SYNC Tx Antenna" on page 48
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CONFigure[:LTE]:DL:SYNC:PPOWer <Power>
This command defines the relative power of the P-SYNC.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:SYNC:PPOW 0.5
Sets a relative power of 0.5 dB.
Manual operation:
See "P-SYNC Relative Power" on page 48
CONFigure[:LTE]:DL:SYNC:SPOWer <Power>
This command defines the relative power of the S-SYNC.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:SYNC:SPOW 0.5
Sets a relative power of 0.5 dB.
Manual operation:
See "S-SYNC Relative Power" on page 48
Reference Signal
CONFigure[:LTE]:DL:REFSig:POWer...............................................................................133
CONFigure[:LTE]:DL:REFSig:POWer <Power>
This command defines the relative power of the reference signal.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:REFS:POW -1.2
Sets a relative power of -1.2 dB.
Manual operation:
See "Rel Power (Reference Signal)" on page 49
Positioning Reference Signal
CONFigure[:LTE]:DL:PRSS:BW...................................................................................... 134
CONFigure[:LTE]:DL:PRSS:CI........................................................................................ 134
CONFigure[:LTE]:DL:PRSS:NPRS...................................................................................134
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CONFigure[:LTE]:DL:PRSS:POWer................................................................................. 134
CONFigure[:LTE]:DL:PRSS:STATe................................................................................. 135
CONFigure[:LTE]:DL:SFNO............................................................................................ 135
CONFigure[:LTE]:DL:PRSS:BW <Bandwidth>
This command defines the bandwidth of the positioning reference signal.
Parameters:
<Bandwidth>
BW1_40 | BW3_00 | BW5_00 | BW10_00 | BW15_00 |
BW20_00
*RST:
BW1_40
Default unit: MHz
Example:
CONF:DL:PRSS:BW BW5_00
Defines a 5 MHz bandwidth for the positiong reference signal.
Manual operation:
See "Bandwidth" on page 49
CONFigure[:LTE]:DL:PRSS:CI <PRSConfiguration>
This command selects the configuration index of the Positioning Reference Signal.
Parameters:
<PRSConfiguration> Number of the configuration index.
Example:
CONF:DL:PRSS:CI 2
Selects configuration index 2 for the positioning reference signal.
Manual operation:
See "Configuration Index" on page 50
CONFigure[:LTE]:DL:PRSS:NPRS <NofDLSubframes>
This command defines the number of subframes the Positioning Reference Signal
occupies.
Parameters:
<NofDLSubframes>
1|2|4|6
Example:
CONF:DL:PRSS:NPRS 1
Defines 1 subframe for the poitioning reference signal.
Manual operation:
See "Num. Subframes (N_PRS)" on page 50
CONFigure[:LTE]:DL:PRSS:POWer <Power>
This command defines the relative power of the Positioning Reference Signal.
Parameters:
<Power>
Example:
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Default unit: dB
CONF:DL:PRSS:POW 1
Defines a relative power of 1 dB for the positioning reference
signal.
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Manual operation:
See "Relative Power (Positioning Reference Signal)" on page 50
CONFigure[:LTE]:DL:PRSS:STATe <State>
This command turns the positioning reference signal on and off.
Parameters:
<State>
ON | OFF
Example:
CONF:DL:PRSS:STAT ON
Turns the positioning reference signal on.
Manual operation:
See "Present" on page 49
CONFigure[:LTE]:DL:SFNO <Offset>
This command defines the frame number offset for the positioning reference signal.
Parameters:
<Offset>
<numeric value>
Example:
CONF:DL:SFNO 4
Defines a frame number offset of 4.
Manual operation:
See "Frame Number Offset" on page 50
CSI Reference Signal
CONFigure[:LTE]:DL:CSIRs:CI........................................................................................135
CONFigure[:LTE]:DL:CSIRs:NAP.................................................................................... 135
CONFigure[:LTE]:DL:CSIRs:OPDSch.............................................................................. 136
CONFigure[:LTE]:DL:CSIRs:POWer................................................................................ 136
CONFigure[:LTE]:DL:CSIRs:SCI......................................................................................136
CONFigure[:LTE]:DL:CSIRs:STATe................................................................................. 136
CONFigure[:LTE]:DL:CSIRs:CI <Index>
This command selects the configuration index for the CSI reference signal.
Parameters:
<Index>
MNEM
Number of the configuration index.
Range:
Example:
0 to 31
CONF:DL:CSIR:CI 12
Selects configuration index 12 for the CSI reference signal.
CONFigure[:LTE]:DL:CSIRs:NAP <Ports>
This command selects the number of antenna ports that transmit the CSI reference
signal.
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Parameters:
<Ports>
TX1
TX2
TX4
TX8
Example:
CONF:DL:CSIR:NAP TX2
Selects 2 antenna ports for the CSI reference signal transmission.
CONFigure[:LTE]:DL:CSIRs:OPDSch <State>
This command turns overwriting of PDSCH resource elements for UEs that do not consider the CSI reference signal on and off.
Parameters:
<State>
ON
The CSI reference signal overwrite PDSCH resource elements.
OFF
PDSCH resource elements remain.
Example:
CONF:DL:CSIR:OPDS ON
Overwrites PDSCH resource elements if necessary.
CONFigure[:LTE]:DL:CSIRs:POWer <Power>
This command defines the relative power of the CSI reference signal.
Parameters:
<Power>
Example:
Default unit: dB
CONF:DL:CSIR:POW 1
Defines a relative power of 1 dB for the CSI reference signal.
CONFigure[:LTE]:DL:CSIRs:SCI <Configuration>
This command defines the subframe configuration for the CSI reference signal.
Parameters:
<Configuration>
Number that selects the subframe configuration.
Range:
Example:
0 to 154
CONF:DL:CSIR:SCI 4
Selects subframe configuration 4 for the CSI reference signal.
CONFigure[:LTE]:DL:CSIRs:STATe <State>
This command turns the CSI reference signal on and off.
Parameters:
<State>
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ON | OFF
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Example:
CONF:DL:CSIR:STAT ON
Turns the CSI reference signal on.
Control Channel
CONFigure[:LTE]:DL:EPDCch:LOCalized.........................................................................137
CONFigure[:LTE]:DL:EPDCch:NPRB............................................................................... 137
CONFigure[:LTE]:DL:EPDCch:POWer............................................................................. 137
CONFigure[:LTE]:DL:EPDCch:RBASsign......................................................................... 138
CONFigure[:LTE]:DL:EPDCch:SID...................................................................................138
CONFigure[:LTE]:DL:PBCH:POWer.................................................................................138
CONFigure[:LTE]:DL:PBCH:STAT................................................................................... 138
CONFigure[:LTE]:DL:PCFich:POWer............................................................................... 139
CONFigure[:LTE]:DL:PCFich:STAT................................................................................. 139
CONFigure[:LTE]:DL:PDCCh:FORMat............................................................................. 139
CONFigure[:LTE]:DL:PDCCh:NOPD................................................................................ 139
CONFigure[:LTE]:DL:PDCCh:POWer...............................................................................140
CONFigure[:LTE]:DL:PHICh:DURation.............................................................................140
CONFigure[:LTE]:DL:PHICh:MITM...................................................................................140
CONFigure[:LTE]:DL:PHICh:NGParameter.......................................................................141
CONFigure[:LTE]:DL:PHICh:NOGRoups.......................................................................... 141
CONFigure[:LTE]:DL:PHICh:POWer................................................................................ 141
CONFigure[:LTE]:DL:PSOFfset....................................................................................... 142
CONFigure[:LTE]:DL:EPDCch:LOCalized <State>
This command turns localized transmission of the EPDCCH on and off.
Parameters:
<State>
ON | OFF
*RST:
ON
Example:
CONF:DL:EPDC:LOC OFF
Turns on distributed transmission of the EPDCCH.
Manual operation:
See "EPDCCH Localized" on page 58
CONFigure[:LTE]:DL:EPDCch:NPRB <NofPRBPairs>
This command selects the number of resource blocks that the EPDCCH-PRB set uses.
Parameters:
<NofPRBPairs>
MNEM | ASEL
Manual operation:
See "EPDCCH PRB Pairs" on page 57
CONFigure[:LTE]:DL:EPDCch:POWer <Power>
This command defines the relative power of the EPDCCH.
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Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:EPDC:POW -0.5
Sets the relative power to -0.5 dB.
Manual operation:
See "EPDCCH Rel Power" on page 58
CONFigure[:LTE]:DL:EPDCch:RBASsign <RBAssignment>
This command defines the resource blocks that the EPDCCH uses.
Parameters:
<RBAssignment>
Example:
CONF:DL:EPDC:RBAS 2
Manual operation:
See "EPDCCH RB Assignment" on page 58
CONFigure[:LTE]:DL:EPDCch:SID <SetID>
This command defines the EPDCCH set ID used to generate EPDCCH reference symbols.
Parameters:
<SetID>
Range:
*RST:
0 to 503
0
Example:
CONF:DL:EPDC:SID 10
Selects set ID 10.
Manual operation:
See "EPDCCH Set ID" on page 57
CONFigure[:LTE]:DL:PBCH:POWer <Power>
This command defines the relative power of the PBCH.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:PBCH:POW -1.1
Sets the relative power to -1.1 dB.
Manual operation:
See "PBCH Relative Power" on page 52
CONFigure[:LTE]:DL:PBCH:STAT <State>
This command turns the PBCH on and off.
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Parameters:
<State>
ON | OFF
*RST:
ON
Example:
CONF:DL:PBCH:STAT ON
Activates the PBCH.
Manual operation:
See "PBCH Present" on page 52
CONFigure[:LTE]:DL:PCFich:POWer <Power>
This command defines the relative power of the PCFICH.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:PCF:POW 0
Sets the relative power to 0 dB.
Manual operation:
See "PCFICH Relative Power" on page 53
CONFigure[:LTE]:DL:PCFich:STAT <State>
This command turns the PCFICH on and off.
Parameters:
<State>
ON | OFF
*RST:
ON
Example:
CONF:DL:PCF:STAT ON
Activates the PCFICH.
Manual operation:
See "PCFICH Present" on page 53
CONFigure[:LTE]:DL:PDCCh:FORMat <Format>
This command selects the PDCCH format.
Parameters:
<Format>
-1 | 0 | 1 | 2 | 3
*RST:
-1
Example:
CONF:DL:PDCCH:FORM 0
Sets the PDDCH format to 0.
Manual operation:
See "PDCCH Format" on page 56
CONFigure[:LTE]:DL:PDCCh:NOPD <NofPDCCH>
This command sets the number of PDCCHs.
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Parameters:
<NofPDCCH>
<numeric value>
*RST:
0
Example:
CONF:DL:PDCCH:NOPD 3
Sets the number of DPCCHs to 3.
Manual operation:
See "Number of PDCCHs" on page 56
CONFigure[:LTE]:DL:PDCCh:POWer <Power>
This command defines the relative power of the PDCCH.
Parameters:
<Power>
<numeric value>
*RST:
0 dB
Default unit: DB
Example:
CONF:DL:PDCCH:POW -1.2
Sets the relative power to -1.2 dB.
Manual operation:
See "PDCCH Rel Power" on page 56
CONFigure[:LTE]:DL:PHICh:DURation <Duration>
This command selects the PHICH duration.
Parameters:
<Duration>
NORM
Normal
EXT
Extended
*RST:
NORM
Example:
CONF:DL:PHIC:DUR NORM
Selects normal PHICH duration.
Manual operation:
See "PHICH Duration" on page 54
CONFigure[:LTE]:DL:PHICh:MITM <State>
This command includes or excludes the use of the PHICH special setting for enhanced
test models.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
CONF:DL:PHIC:MITM ON
Activates PHICH TDD m_i=1 (E-TM)
Manual operation:
See "PHICH TDD m_i=1 (E-TM)" on page 54
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Remote Commands to Configure the Application
CONFigure[:LTE]:DL:PHICh:NGParameter <Ng>
This command selects the method that determines the number of PHICH groups in a
subframe.
Parameters:
<Ng>
NG1_6 | NG1_2 | NG1 | NG2 | NGCUSTOM
Select NGCUSTOM to customize Ng. You can then define the
variable as you like with CONFigure[:LTE]:DL:PHICh:
NOGRoups.
*RST:
NG1_6
Example:
CONF:DL:PHIC:NGP NG1_6
Sets Ng to 1/6. The number fo PHICH groups in the subframe
depends on the number of resource blocks.
CONF:DL:PHIC:NGP NGCUSTOM
Define a customized value for Ng.
CONF:DL:PHIC:NOGR 5
Directly sets the number of PHICH groups in the subframe to 5.
Manual operation:
See "PHICH N_g" on page 55
CONFigure[:LTE]:DL:PHICh:NOGRoups <NofGroups>
This command sets the number of PHICH groups.
Parameters:
<NofGroups>
<numeric value>
*RST:
0
Example:
CONF:DL:PHIC:NOGR 5
Sets number of PHICH groups to 5.
Manual operation:
See "PHICH Number of Groups" on page 55
CONFigure[:LTE]:DL:PHICh:POWer <Power>
This command defines the relative power of the PHICH.
Parameters:
<Power>
<numeric value>
*RST:
-3.01 dB
Default unit: DB
Example:
CONF:DL:PHIC:POW -1.3
Sets the relative power to -1.3 dB.
Manual operation:
See "PHICH Rel Power" on page 55
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CONFigure[:LTE]:DL:PSOFfset <Offset>
This command defines the symbol offset for PDSCH allocations relative to the start of
the subframe.
The offset applies to all subframes.
Parameters:
<Offset>
AUTO
Automatically determines the symbol offset.
<numeric value>
Manual selection of the symbol offset.
Range:
*RST:
0 to 4
AUTO
Example:
CONF:DL:PSOF 2
Sets an offset of 2 symbols.
Manual operation:
See "PRB Symbol Offset" on page 51
Shared Channel
CONFigure[:LTE]:DL:PDSCh:PB..................................................................................... 142
CONFigure[:LTE]:DL:PDSCh:PB <PDSChPB>
This command selects the PDSCH power ratio.
Note that the power ratio depends on the number of antennas in the system.
Parameters:
<PDSChPB>
Numeric value that defines PDSCH P_B which defines the
power ratio in dB.
0
1
2
3
See PDSCH Power Ratio for an overview of resulting power
ratios.
RAT1
Ratio = 1, regardless of the number of antennas.
6.8.2.2
Example:
CONF:DL:PDSC:PB 3
Selects the PDSCH P_B '3'.
Manual operation:
See "PDSCH Power Ratio" on page 58
Signal Capture
●
●
Data Capture.........................................................................................................143
Trigger...................................................................................................................145
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Data Capture
[SENSe][:LTE]:FRAMe:COUNt........................................................................................ 143
[SENSe][:LTE]:FRAMe:COUNt:AUTO.............................................................................. 143
[SENSe][:LTE]:FRAMe:COUNt:STATe............................................................................. 143
[SENSe][:LTE]:FRAMe:SCOunt.......................................................................................144
[SENSe]:SWAPiq...........................................................................................................144
[SENSe]:SWEep:TIME................................................................................................... 144
[SENSe][:LTE]:FRAMe:COUNt <Subframes>
This command sets the number of frames you want to analyze.
Parameters:
<Subframes>
<numeric value>
*RST:
1
Example:
FRAM:COUN:STAT ON
FRAM:COUN:AUTO OFF
Activates manual input of frames to be analyzed.
FRAM:COUN 20
Analyzes 20 frames.
Manual operation:
See "Number of Frames to Analyze" on page 64
[SENSe][:LTE]:FRAMe:COUNt:AUTO <State>
This command turns automatic selection of the number of frames to analyze on and
off.
Parameters:
<State>
ON
Selects the number of frames to analyze according to the LTE
standard.
OFF
Turns manual selection of the frame number on.
Example:
FRAM:COUN:AUTO ON
Turns automatic selection of the analyzed frames on.
Manual operation:
See "Auto According to Standard" on page 64
[SENSe][:LTE]:FRAMe:COUNt:STATe <State>
This command turns manual selection of the number of frames you want to analyze on
and off.
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Parameters:
<State>
ON
You can set the number of frames to analyze.
OFF
The R&S VSE analyzes a single sweep.
*RST:
ON
Example:
FRAM:COUN:STAT ON
Turns manual setting of number of frames to analyze on.
Manual operation:
See "Overall Frame Count" on page 64
[SENSe][:LTE]:FRAMe:SCOunt <Subframes>
This command selects the maximum number of subframes to analyze.
Selecting a number of subframes different from the default one may become necessary if the capture time is less than 20.1 ms.
Parameters:
<Subframes>
ALL
Analyzes all subframes of a frame (10).
<numeric value>
Number of subframes that the application analyzes.
Range:
*RST:
1 to 9
ALL
Example:
FRAM:SCO 3
Analyzes three subframes.
Manual operation:
See "Maximum Number of Subframes per Frame to Analyze"
on page 65
[SENSe]:SWAPiq <State>
This command turns a swap of the I and Q branches on and off.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
SWAP ON
Turns a swap of the I and Q branches on.
Manual operation:
See "Swap I/Q" on page 64
[SENSe]:SWEep:TIME <CaptLength>
This command sets the capture time.
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Parameters:
<CaptLength>
Numeric value in seconds.
Default unit: s
Example:
SWE:TIME 40ms
Defines a capture time of 40 milliseconds.
Manual operation:
See "Capture Time" on page 63
Trigger
The trigger functionality of the LTE measurement application is the same as that of the
R&S VSE.
For a comprehensive description of the available remote control commands for trigger
configuration see the documentation of the R&S VSE.
TRIGger[:SEQuence]:HOLDoff<instrument>..................................................................... 145
TRIGger[:SEQuence]:LEVel<instrument>[:EXTernal].........................................................145
TRIGger[:SEQuence]:PORT<instrument>.........................................................................145
TRIGger[:SEQuence]:SLOPe.......................................................................................... 146
TRIGger[:SEQuence]:SOURce........................................................................................146
TRIGger[:SEQuence]:HOLDoff<instrument> <Offset>
This command defines the trigger offset.
Parameters:
<Offset>
<numeric value>
*RST:
0s
Default unit: s
Example:
TRIG:HOLD 5MS
Sets the trigger offset to 5 ms.
TRIGger[:SEQuence]:LEVel<instrument>[:EXTernal] <Level>
This command defines the level for an external trigger.
Parameters:
<Level>
Example:
Range:
0.5 V to 3.5 V
*RST:
1.4 V
Default unit: V
TRIG:LEV 2V
Defines a trigger level of 2 V.
TRIGger[:SEQuence]:PORT<instrument> <Port>
This command selects the trigger port for measurements with devices that have several trigger ports.
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Parameters:
<Port>
PORT1
PORT2
PORT3
Example:
TRIG:PORT PORT1
Selects trigger port 1.
TRIGger[:SEQuence]:SLOPe <Type>
Parameters:
<Type>
POSitive | NEGative
POSitive
Triggers when the signal rises to the trigger level (rising edge).
NEGative
Triggers when the signal drops to the trigger level (falling edge).
*RST:
Example:
POSitive
TRIG:SLOP NEG
TRIGger[:SEQuence]:SOURce <Source>
This command selects the trigger source.
Note that the availability of trigger sources depends on the connected instrument.
Note on external triggers:
If a measurement is configured to wait for an external trigger signal in a remote control
program, remote control is blocked until the trigger is received and the program can
continue. Make sure this situation is avoided in your remote control programs.
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Parameters:
<Source>
IMMediate
Free Run
EXT1 | EXT2 | EXT3 | EXT4
Trigger signal from the corresponding TRIGGER INPUT/
OUTPUT connector on the connected instrument, or the oscilloscope's corresponding input channel.
For details on the connectors see the instrument's Getting Started manual.
RFPower
First intermediate frequency
IFPower
Second intermediate frequency
IQPower
Magnitude of sampled I/Q data
For applications that process I/Q data, such as the I/Q Analyzer
or optional applications.
MAGNitude
For (offline) input from a file, rather than an instrument. Triggers
on a specified signal level.
*RST:
Example:
6.8.2.3
IMMediate
TRIG:SOUR EXT
Selects the external trigger input as source of the trigger signal
Demodulation
[SENSe][:LTE]:DL:DEMod:MCFilter................................................................................. 147
[SENSe][:LTE]:DL:DEMod:CBSCrambling........................................................................ 148
CONFigure[:LTE]:DL:MIMO:CROSstalk............................................................................148
[SENSe][:LTE]:DL:DEMod:DACHannels...........................................................................148
[SENSe][:LTE]:DL:DEMod:EVMCalc................................................................................ 148
[SENSe][:LTE]:DL:DEMod:PRData.................................................................................. 149
[SENSe][:LTE]:DL:DEMod:MCFilter <State>
This command turns suppression of interfering neighboring carriers on and off (e.g.
LTE, WCDMA, GSM etc).
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
DL:DEM:MCF ON
Turns suppression on of neighboring carriers on.
Manual operation:
See "Multicarrier Filter" on page 67
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[SENSe][:LTE]:DL:DEMod:CBSCrambling <State>
This command turns scrambling of coded bits for downlink signals on and off.
Parameters:
<State>
ON | OFF
*RST:
ON
Example:
DL:DEM:CBSC ON
Activate scrambling of coded bits.
Manual operation:
See "Scrambling of Coded Bits" on page 67
CONFigure[:LTE]:DL:MIMO:CROSstalk <State>
This command turns MIMO crosstalk compensation on and off.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
CONF:DL:MIMO:CROS ON
Turns crosstalk compensation on.
Manual operation:
See "Compensate Crosstalk" on page 67
[SENSe][:LTE]:DL:DEMod:DACHannels <State>
This command turns the decoding of all control channels on and off.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
DL:DEM:DACH ON
Turns decoding of all control channels on.
Manual operation:
See "Decode All Channels" on page 68
[SENSe][:LTE]:DL:DEMod:EVMCalc <Calculation>
This command selects the EVM calculation method for downlink signals.
Parameters:
<Calculation>
TGPP
3GPP definition
OTP
Optimal timing position
*RST:
Example:
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DL:DEM:EVMC TGPP
Use 3GPP method.
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Manual operation:
See "EVM Calculation Method" on page 68
[SENSe][:LTE]:DL:DEMod:PRData <Reference>
This command the type of reference data to calculate the EVM for the PDSCH.
Parameters:
<Reference>
AUTO
Automatic identification of reference data.
ALL0
Reference data is 0, according to the test model definition.
6.8.2.4
Example:
DL:DEM:PRD ALL0
Sets the reference data of the PDSCH to 0.
Manual operation:
See "PDSCH Reference Data" on page 68
Parameter Estimation
Estimating Parameters
[SENSe][:LTE]:DL:DEMod:BESTimation...........................................................................149
[SENSe][:LTE]:DL:DEMod:CESTimation.......................................................................... 149
[SENSe][:LTE]:DL:DEMod:BESTimation <State>
This command turns boosting estimation for downlink signals on and off.
Parameters:
<State>
ON | OFF
*RST:
ON
Example:
DL:DEM:BEST ON
Turns boosting estimation on.
Manual operation:
See "Boosting Estimation" on page 66
[SENSe][:LTE]:DL:DEMod:CESTimation <Type>
This command selects the channel estimation type for downlink signals.
Parameters:
<Type>
TGPP
3GPP EVM definition
PIL
Optimal, pilot only
PILP
Optimal, pilot and payload
*RST:
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Example:
DL:DEM:CEST TGPP
Use 3GPP EVM definition for channel estimation.
Manual operation:
See "Channel Estimation" on page 66
Compensating Measurement Errors
[SENSe][:LTE]:DL:TRACking:PHASe............................................................................... 150
[SENSe][:LTE]:DL:TRACking:TIME..................................................................................150
[SENSe][:LTE]:DL:TRACking:PHASe <Type>
This command selects the phase tracking type for downlink signals.
Parameters:
<Type>
OFF
Deactivate phase tracking
PIL
Pilot only
PILP
Pilot and payload
*RST:
OFF
Example:
DL:TRAC:PHAS PILPAY
Use pilots and payload for phase tracking.
Manual operation:
See "Phase" on page 66
[SENSe][:LTE]:DL:TRACking:TIME <State>
This command turns timing tracking for downlink signals on and off.
Parameters:
<State>
ON | OFF
*RST:
6.8.2.5
OFF
Example:
DL:TRAC:TIME ON
Activates timing tracking.
Manual operation:
See "Timing" on page 67
Configuring Inputs and Outputs
Useful commands to perform measurements described elsewhere:
●
INPut:COUPling on page 156
●
INPut:IMPedance on page 157
INPut:FILTer:HPASs[:STATe]..........................................................................................151
INPut:FILTer:YIG[:STATe].............................................................................................. 151
INPut:SELect.................................................................................................................151
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INPut:FILTer:HPASs[:STATe] <State>
Activates an additional internal high-pass filter for RF input signals from 1 GHz to
3 GHz. This filter is used to remove the harmonics of the connected instrument in order
to measure the harmonics for a DUT, for example.
This function requires an additional high-pass filter hardware option.
(Note: for RF input signals outside the specified range, the high-pass filter has no
effect. For signals with a frequency of approximately 4 GHz upwards, the harmonics
are suppressed sufficiently by the YIG filter.)
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
INP:FILT:HPAS ON
Turns on the filter.
Usage:
SCPI confirmed
Manual operation:
See "High-Pass Filter 1...3 GHz" on page 59
INPut:FILTer:YIG[:STATe] <State>
This command turns the YIG-preselector on and off.
Note the special conditions and restrictions for the YIG filter described in "YIG-Preselector" on page 59.
Example:
INP:FILT:YIG OFF
Deactivates the YIG-preselector.
Manual operation:
See "YIG-Preselector" on page 59
INPut:SELect <Source>
This command selects the signal source for measurements, i.e. it defines which connector is used to input data to the R&S VSE.
Parameters:
<Source>
RF
Radio Frequency ("RF INPUT" connector)
FIQ
I/Q data file
*RST:
Manual operation:
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See "I/Q File State" on page 60
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6.8.2.6
Defining the Frequency
[SENSe]:FREQuency:CENTer[:CC<cci>]..........................................................................152
[SENSe]:FREQuency:CENTer[:CC<cci>]:OFFSet............................................................. 152
[SENSe:]FREQuency:CENTer:STEP............................................................................... 153
[SENSe:]FREQuency:CENTer:STEP:LINK....................................................................... 153
[SENSe:]FREQuency:CENTer:STEP:LINK:FACTor........................................................... 154
[SENSe]:FREQuency:CENTer[:CC<cci>] <Frequency>
This command sets the center frequency for RF measurements.
Component carrier measurements
●
Defining or querying the frequency of the first carrier is possible with
FREQ:CENT:CC1. The CC1 part of the syntax is mandatory in that case.
●
FREQ:CENT? queries the measurement frequency (center of the two carriers).
Parameters:
<Frequency>
<numeric value>
Range:
fmin to fmax
*RST:
1 GHz
Default unit: Hz
Example:
Measurement on one carrier:
FREQ:CENT 1GHZ
Defines a center frequency of 1 GHz
Example:
Measurement on aggregated carriers:
FREQ:CENT:CC1 850MHZ
Defines a center frequency of 850 MHz for the first carrier.
Manual operation:
See "Defining the Signal Frequency" on page 61
[SENSe]:FREQuency:CENTer[:CC<cci>]:OFFSet <Frequency>
This command defines the general frequency offset or the frequency offset for a component carrier.
The effect of the command depends on the syntax:
●
When you omit the [CC<cci>] syntax element, the command defines the overall
frequency offset.
In that case, the value is added to the measurement frequency and, in case of
measurements with component carriers, the center frequency of the component
carriers.
●
When you include the [CC<cci>] syntax element, the command defines the offset
of the component carrier relative the first component carrier.
In that case, the command is not available for the first component carrier thus, ...:CC1:... is not possible.
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Parameters:
<Frequency>
• General frequency offset: frequency offset in Hz.
• Component carrier offset: frequency offset relative to the first
component carrier in Hz.
Example:
FREQ:CENT:OFFS 50HZ
Adds a frequency offset of 50 Hz to the measurement frequency.
If you are measuring component carriers, the value is also
added to the center frequencies of those carriers.
FREQ:CENT:CC2:OFFS 15MHZ
Defines a frequency offset of 15 MHz for the second component
carrier relative to the first component carrier.
Manual operation:
See "Defining the Signal Frequency" on page 61
[SENSe:]FREQuency:CENTer:STEP <StepSize>
This command defines the center frequency step size.
You can increase or decrease the center frequency quickly in fixed steps using the
SENS:FREQ UP and SENS:FREQ DOWN commands, see [SENSe]:FREQuency:
CENTer[:CC<cci>] on page 152.
Parameters:
<StepSize>
fmax is specified in the data sheet.
Range:
1 to fMAX
*RST:
0.1 x span
Default unit: Hz
Example:
FREQ:CENT 100 MHz
FREQ:CENT:STEP 10 MHz
FREQ:CENT UP
Sets the center frequency to 110 MHz.
Manual operation:
See "Defining the Signal Frequency" on page 61
[SENSe:]FREQuency:CENTer:STEP:LINK <CouplingType>
This command couples and decouples the center frequency step size to the span or
the resolution bandwidth.
Parameters:
<CouplingType>
SPAN
Couples the step size to the span. Available for measurements
in the frequency domain.
OFF
Decouples the step size.
*RST:
Example:
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FREQ:CENT:STEP:LINK SPAN
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[SENSe:]FREQuency:CENTer:STEP:LINK:FACTor <Factor>
Parameters:
<Factor>
1 to 100 PCT
*RST:
Example:
6.8.2.7
10
FREQ:CENT:STEP:LINK:FACT 20PCT
Configuring Amplitude Characteristics
The commands are available when you capture data with an instrument. In addition,
the commands that are available depend on the configuration of the connected instrument.
CALCulate<n>:UNIT:POWer........................................................................................... 154
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel....................................................... 154
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet........................................... 155
INPut:ATTenuation.........................................................................................................155
INPut:ATTenuation:AUTO...............................................................................................155
INPut:COUPling.............................................................................................................156
INPut:GAIN[:VALue].......................................................................................................156
INPut:GAIN:STATe........................................................................................................ 156
INPut:IMPedance...........................................................................................................157
INPut<n>:EATT............................................................................................................. 157
INPut<n>:EATT:AUTO................................................................................................... 157
INPut<n>:EATT:STATe.................................................................................................. 157
[SENSe:]ADJust:LEVel................................................................................................... 158
CALCulate<n>:UNIT:POWer <Unit>
This command selects the unit of the y-axis.
The unit applies to all measurement windows.
Parameters:
<Unit>
DBM | V | A | W | DBPW | WATT | DBUV | DBMV | VOLT |
DBUA | AMPere
*RST:
dBm
Example:
CALC:UNIT:POW DBM
Sets the power unit to dBm.
Manual operation:
See "Defining a Reference Level" on page 61
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel <ReferenceLevel>
This command defines the reference level (for all traces, <t> is irrelevant).
With a reference level offset ≠ 0, the value range of the reference level is modified by
the offset.
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Parameters:
<ReferenceLevel>
The unit is variable.
Range:
*RST:
see datasheet
0 dBm
Example:
DISP:TRAC:Y:RLEV -60dBm
Usage:
SCPI confirmed
Manual operation:
See "Defining a Reference Level" on page 61
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet <Offset>
This command defines a reference level offset (for all traces, <t> is irrelevant).
Parameters:
<Offset>
Range:
*RST:
-200 dB to 200 dB
0dB
Example:
DISP:TRAC:Y:RLEV:OFFS -10dB
Manual operation:
See "Defining a Reference Level" on page 61
INPut:ATTenuation <Attenuation>
This command defines the total attenuation for RF input.
If you set the attenuation manually, it is no longer coupled to the reference level, but
the reference level is coupled to the attenuation. Thus, if the current reference level is
not compatible with an attenuation that has been set manually, the command also
adjusts the reference level.
Parameters:
<Attenuation>
Range:
see data sheet
Increment: 5 dB
*RST:
10 dB (AUTO is set to ON)
Example:
INP:ATT 30dB
Defines a 30 dB attenuation and decouples the attenuation from
the reference level.
Usage:
SCPI confirmed
Manual operation:
See "Attenuating the Signal" on page 62
INPut:ATTenuation:AUTO <State>
This command couples or decouples the attenuation to the reference level. Thus, when
the reference level is changed, the R&S VSE determines the signal level for optimal
internal data processing and sets the required attenuation accordingly.
Parameters:
<State>
ON | OFF | 0 | 1
*RST:
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Example:
INP:ATT:AUTO ON
Couples the attenuation to the reference level.
Usage:
SCPI confirmed
INPut:COUPling <CouplingType>
This command selects the coupling type of the RF input.
Parameters:
<CouplingType>
AC
AC coupling
DC
DC coupling
*RST:
AC
Example:
INP:COUP DC
Usage:
SCPI confirmed
Manual operation:
See "Input Coupling" on page 63
INPut:GAIN[:VALue] <Gain>
This command selects the gain level if the preamplifier is activated (INP:GAIN:STAT
ON, see INPut:GAIN:STATe on page 156).
The command requires the additional preamplifier hardware option.
Parameters:
<Gain>
15 dB | 30 dB
The availability of gain levels depends on the model of the connected instrument.
*RST:
OFF
Example:
INP:GAIN:VAL 30
Switches on 30 dB preamplification.
Usage:
SCPI confirmed
INPut:GAIN:STATe <State>
This command turns the preamplifier on the connected instrument on and off. It
requires the additional preamplifiier hardware option on the connected instrument.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
INP:GAIN:STAT ON
Switches on 30 dB preamplification.
Usage:
SCPI confirmed
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INPut:IMPedance <Impedance>
This command selects the nominal input impedance of the RF input. In some applications, only 50 Ω are supported.
75 Ω should be selected if the 50 Ω input impedance is transformed to a higher impedance using a matching pad of the RAZ type (= 25 Ω in series to the input impedance
of the instrument). The power loss correction value in this case is 1.76 dB = 10 log
(75Ω/50Ω).
Parameters:
<Impedance>
50 | 75
*RST:
50 Ω
Example:
INP:IMP 75
Usage:
SCPI confirmed
Manual operation:
See "Impedance" on page 63
INPut<n>:EATT <Attenuation>
This command defines the electronic attenuation level.
If the current reference level is not compatible with an attenuation that has been set
manually, the command also adjusts the reference level.
Parameters:
<Attenuation>
Attenuation level in dB.
Default unit: dB
Example:
INP:EATT 10
Defines an attenuation level of 10 dB.
Manual operation:
See "Attenuating the Signal" on page 62
INPut<n>:EATT:AUTO <State>
This command turns automatic selection of the electronic attenuation on and off.
If on, electronic attenuation reduces the mechanical attenuation whenever possible.
Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
INP:EATT:AUTO ON
Turns automatic selection of electronic attenuation level on.
Manual operation:
See "Attenuating the Signal" on page 62
INPut<n>:EATT:STATe <State>
This command turns the electronic attenuator on and off.
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Parameters:
<State>
ON | OFF
*RST:
OFF
Example:
INP:EATT:STAT ON
Turns the electronic attenuator on.
Manual operation:
See "Attenuating the Signal" on page 62
[SENSe:]ADJust:LEVel
This command initiates a single (internal) measurement that evaluates and sets the
ideal reference level for the current input data and measurement settings. This ensures
that the settings of the RF attenuation and the reference level are optimally adjusted to
the signal level without overloading the R&S VSE or limiting the dynamic range by an
S/N ratio that is too small.
Example:
ADJ:LEV
Usage:
Event
Manual operation:
See "Defining a Reference Level" on page 61
6.9 Analysis
●
●
●
Evaluation Range..................................................................................................158
Y-Axis Scale..........................................................................................................161
Result Settings......................................................................................................162
6.9.1 Evaluation Range
CONFigure[:LTE]:DL:BF:AP............................................................................................ 158
[SENSe][:LTE]:ALLocation:SELect...................................................................................159
[SENSe][:LTE]:CARRier:SELect...................................................................................... 159
[SENSe][:LTE]:LOCation:SELect..................................................................................... 160
[SENSe][:LTE]:MODulation:SELect..................................................................................160
[SENSe][:LTE]:SUBFrame:SELect................................................................................... 160
[SENSe][:LTE]:SYMBol:SELect....................................................................................... 161
CONFigure[:LTE]:DL:BF:AP <Port>
This command selects the antenna port for beamforming measurements.
The availabilty of ports depends on the number of transmit antennas and number of
beamforming layers.
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Parameters:
<Port>
AP_5_7 (antenna ports 5, 7)
AP8 (antenna ports 8)
AP9 (antenna ports 9)
AP10 (antenna ports 10)
Example:
CONF:DL:BF:AP AP816
Selects antenna ports 8 and 16.
[SENSe][:LTE]:ALLocation:SELect <Allocation>
This command filters the displayed results in the constellation diagram by a particular
type of allocation.
Parameters:
<Allocation>
ALL
Shows the results for all allocations.
<numeric_value>
Shows the results for a particular allocation type.
Allocation types are mapped to numeric values. For the code
assignment see chapter 6.5.1.22, "Return Value Codes",
on page 102.
*RST:
ALL
Example:
ALL:SEL 2
Shows the results for PDSCH allocation 2.
Manual operation:
See "Evaluation Range for the Constellation Diagram"
on page 71
[SENSe][:LTE]:CARRier:SELect <Carrier>
This command filters the displayed results in the constellation diagram by a particular
subcarrier.
Parameters:
<Carrier>
ALL
Shows the results for all subcarriers.
<numeric_value>
Shows the results for a particular subcarrier.
*RST:
ALL
Example:
CARR:SEL 1
Shows the results for subcarrier 1.
Manual operation:
See "Evaluation Range for the Constellation Diagram"
on page 71
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[SENSe][:LTE]:LOCation:SELect <Location>
This command selects the data source of the constellation diagram for measurements
on downlink signals.
Parameters:
<Location>
AMD
After the MIMO decoder
BMD
Before the MIMO decoder
*RST:
BMD
Example:
LOC:SEL AMD
Use data from after the MIMO decoder.
Manual operation:
See "Evaluation Range for the Constellation Diagram"
on page 71
[SENSe][:LTE]:MODulation:SELect <Modulation>
This command filters the displayed results in the constellation diagram by a particular
type of modulation.
Parameters:
<Modulation>
ALL
Shows the results for all modulation types.
<numeric_value>
Shows the results for a particular modulation type.
Modulation types are mapped to numeric values. For the code
assignment see chapter 6.5.1.22, "Return Value Codes",
on page 102.
*RST:
ALL
Example:
MOD:SEL 3
Shows the results for all elements with a 16QAM modulation
Manual operation:
See "Evaluation Range for the Constellation Diagram"
on page 71
[SENSe][:LTE]:SUBFrame:SELect <Subframe>
This command selects the subframe to be analyzed.
Parameters:
<Subframe>
ALL | <numeric value>
ALL
Select all subframes
0...39
Select a single subframe
*RST:
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Example:
SUBF:SEL ALL
Select all subframes for analysis.
Manual operation:
See "Subframe Selection" on page 70
[SENSe][:LTE]:SYMBol:SELect <Symbol>
This command filters the displayed results in the constellation diagram by a particular
OFDM symbol.
Parameters:
<Symbol>
ALL
Shows the results for all subcarriers.
<numeric_value>
Shows the results for a particular OFDM symbol.
*RST:
ALL
Example:
SYMB:SEL 2
Shows the results for the second OFDM symbol.
Manual operation:
See "Evaluation Range for the Constellation Diagram"
on page 71
6.9.2 Y-Axis Scale
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:AUTO ONCE............................................... 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MAXimum................................................... 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MINimum.....................................................162
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:AUTO ONCE
Automatic scaling of the y-axis is performed once, then switched off again (for all
traces, <t> is irrelevant).
Usage:
SCPI confirmed
Manual operation:
See "Y-Axis Scale" on page 72
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MAXimum <Value>
This command defines the maximum value of the y-axis for all traces in the selected
result display.
The suffix <t> is irrelevant.
Parameters:
<Value>
<numeric value>
*RST:
depends on the result display
The unit and range depend on the result display.
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Example:
DISP:TRAC:Y:MIN -60
DISP:TRAC:Y:MAX 0
Defines the y-axis with a minimum value of -60 and maximum
value of 0.
Manual operation:
See "Y-Axis Scale" on page 72
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MINimum <Value>
This command defines the minimum value of the y-axis for all traces in the selected
result display.
The suffix <t> is irrelevant.
Parameters:
<Value>
<numeric value>
*RST:
depends on the result display
The unit and range depend on the result display.
Example:
DISP:TRAC:Y:MIN -60
DISP:TRAC:Y:MAX 0
Defines the y-axis with a minimum value of -60 and maximum
value of 0.
Manual operation:
See "Y-Axis Scale" on page 72
6.9.3 Result Settings
CALCulate:MARKer:COUPling........................................................................................ 162
UNIT:BSTR................................................................................................................... 162
UNIT:CAXes..................................................................................................................163
UNIT:EVM.....................................................................................................................163
CALCulate:MARKer:COUPling <State>
This command couples or decouples markers in different result displays to each other.
Parameters:
<State>
ON | OFF
Example:
CALC:MARK:COUP ON
Couples the markers to each other.
Manual operation:
See "Marker Coupling" on page 74
UNIT:BSTR <Unit>
This command selects the way the bit stream is displayed.
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Parameters:
<Unit>
SYMbols
Displays the bit stream using symbols
BITs
Displays the bit stream using bits
*RST:
SYMbols
Example:
UNIT:BSTR BIT
Bit stream gets displayed using Bits.
Manual operation:
See "Bit Stream Format" on page 73
UNIT:CAXes <Unit>
This command selects the scale of the x-axis for result displays that show subcarrier
results.
Parameters:
<Unit>
CARR
Shows the number of the subcarriers on the x-axis.
HZ
Shows the frequency of the subcarriers on the x-axis.
Example:
UNIT:CAX HZ
Selects frequency scale for the x-axis.
Manual operation:
See "Carrier Axes" on page 74
UNIT:EVM <Unit>
This command selects the EVM unit.
Parameters:
<Unit>
DB
EVM results returned in dB
PCT
EVM results returned in %
*RST:
PCT
Example:
UNIT:EVM PCT
EVM results to be returned in %.
Manual operation:
See "EVM Unit" on page 73
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Common R&S VSE Menus
A Annex: Reference
●
●
Common R&S VSE Menus................................................................................... 164
LTE Measurement Menus.....................................................................................166
A.1 Common R&S VSE Menus
The following menus provide basic functions for all applications:
●
●
●
File Menu.............................................................................................................. 164
Window Menu....................................................................................................... 165
Help Menu.............................................................................................................166
A.1.1 File Menu
The "File" menu includes all functionality directly related to any file operations, printing
or setting up general parameters.
For a description of these functions see the "Data Management" chapter in the
R&S VSE User Manual.
Menu item
Corresponding icon in
toolbar
Description
Save
Saves the current software configuration to a file
Recall
Recalls a saved software configuration from a file
Save IQ Recording
-
Saves the recorded I/Q data from a measurement channel to a
file
Recall IQ Recording
-
Loads the recorded I/Q data from a file
Measurement Group >
-
Configures measurement channels and groups
> New Group
-
Inserts a new group in the measurement sequence
> New Measurement
Channel
-
Inserts a new channel in the selected group
> Replace Measurement Channel
-
Replaces the currently selected channel by the selected application.
> Delete Current Measurement Channel
-
Deletes the currently selected channel.
> Measurement Group
Setup
-
Displays the "Measurement Group Setup" tool window.
Instruments >
-
Configures instruments to be used for input to the R&S VSE software
> New
-
Creates a new instrument configuration
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Menu item
Corresponding icon in
toolbar
Description
> Search
-
Searches for connected instruments in the network
> Delete All
-
Deletes all current instrument configurations
> Setup
-
Hides or displays the "Instrument" tool window
Preset >
-
Restores stored settings
> All
-
Restores the default software configuration globally for the entire
software
> All & Delete Instruments
Restores the default software configuration globally for the entire
software and deletes all instrument configurations
> Selected Channel
-
Restores the default software configuration for an individual
channel
> Reset VSE Layout
-
Restores the default layout of windows, toolbars etc. in the
R&S VSE software
Preferences >
-
Configures global software settings
> General
-
> Displayed Items
-
Hides or shows individual screen elements
> Theme & Color
-
Configures the style of individual screen elements
> Network & Remote
-
Configures the network settings and remote access to or from
other devices
> Recording
-
Configures general recording parameters
Print
-
Opens "Print" dialog to print selected measurement results
Exit
-
Closes the R&S VSE software
A.1.2 Window Menu
The "Window" menu allows you to hide or show individual windows.
For a description of these functions see the "Controlling Instruments and Capturing
Data" chapter in the R&S VSE User Manual.
Menu item
Corresponding icon in
toolbar
Description
Player...
-
Displays the "Player" tool window to recall I/Q data recordings
Instrument Setup...
-
Displays the "Instruments" window to configure input instruments
Measurement Group
Setup...
-
Displays the "Measurement Group Setup" window to configure a
measurement sequence
New Window >
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Menu item
Corresponding icon in
toolbar
Description
Channel Infos >
-
Displays the channel bar with global channel information for the
selected meausrement channel
Active Windows >
-
Selects a result display as the active window; the corresponding
channel is also activated
Configure Selected
Result Window
-
Displays the "Window Configuration" dialog box to configure
result-specific settings
A.1.3 Help Menu
The "Help" menu provides access to help, support and licensing functions.
For a description of these functions see the "Basic Operations" and "General Software
Settings" chapters in the R&S VSE User Manual.
Menu item
Corresponding icon in
toolbar
Help
Description
Opens the Online help window
License
-
Licensing, version and options information
Support
-
Support functions
About
-
Software version information
A.2 LTE Measurement Menus
●
●
●
●
●
Input & Output Menu.............................................................................................166
Meas Setup Menu.................................................................................................167
Trace Menu........................................................................................................... 167
Marker Menu......................................................................................................... 167
Limits Menu...........................................................................................................168
A.2.1 Input & Output Menu
The "Input & Output" menu provides functions to configure the input source, frontend
parameters and output settings for the measurement.
This menu is application-specific.
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Table 1-1: "Input" menu items for LTE measurements
Menu item
Description
Amplitude
chapter 4.1.18, "Defining Level Characteristics", on page 61
Scale
chapter 5.3, "Scale", on page 72
Frequency
chapter 4.1.17, "Defining the Frequency", on page 60
Trigger
chapter 4.1.20, "Triggering Measurements", on page 65
Input Source
chapter 4.1.16, "Selecting the Input and Output Source", on page 59
Output Source
A.2.2 Meas Setup Menu
The "Meas Setup" menu provides access to most measurement-specific settings, as
well as bandwidth, sweep and auto configuration settings, and the configuration "Overview" window.
This menu is application-specific.
Table 1-2: "Meas Setup" menu items for LTE measurements
Menu item
Description
Select Measurement
chapter 3, "Measurements and Result Displays", on page 13
Signal Description
chapter 4.1.2, "Defining Signal Characteristics", on page 35
MIMO Setup
chapter 4.1.3, "Configuring MIMO Setups", on page 40
PDSCH Settings
chapter 4.1.4, "Demodulating the PDSCH", on page 40
chapter 4.1.5, "Configuring PDSCH Subframes", on page 42
Trigger / Signal Capture
chapter 4.1.19, "Configuring the Data Capture", on page 63
Parameter Estimation /
Tracking
chapter 4.1.21, "Estimating Parameters", on page 65
Demod
chapter 4.1.23, "Configuring Demodulation Parameters", on page 67
Evaluation Range
chapter 5.2, "Evaluation Range", on page 70
Result Settings
chapter 5.4, "Result Settings", on page 73
Overview
chapter 4.1.1, "Configuration Overview", on page 34
A.2.3 Trace Menu
The "Trace" does not contain any functions for LTE measurements, traces are generally not configurable.
A.2.4 Marker Menu
The "Marker" menu provides access to marker-specific functions.
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Annex: Reference
LTE Measurement Menus
This menu is application-specific.
Table 1-3: "Marker" menu items for LTE measurements
Menu item
Corresponding icon in
toolbar
Select marker <x>
Marker to Trace
Description
chapter 5.5, "Markers", on page 74
-
chapter 5.5, "Markers", on page 74
All Markers Off
chapter 5.5, "Markers", on page 74
Marker...
chapter 5.5, "Markers", on page 74
Search
-
chapter 5.5, "Markers", on page 74
A.2.5 Limits Menu
The "Limits" menu does not contain any functions for LTE measurements.
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List of Commands
List of Commands
[SENSe:]ADJust:LEVel..................................................................................................................................158
[SENSe:]FREQuency:CENTer:STEP............................................................................................................ 153
[SENSe:]FREQuency:CENTer:STEP:LINK................................................................................................... 153
[SENSe:]FREQuency:CENTer:STEP:LINK:FACTor......................................................................................154
[SENSe]:FREQuency:CENTer[:CC<cci>]......................................................................................................152
[SENSe]:FREQuency:CENTer[:CC<cci>]:OFFSet........................................................................................ 152
[SENSe]:SWAPiq...........................................................................................................................................144
[SENSe]:SWEep:TIME.................................................................................................................................. 144
[SENSe][:LTE]:ALLocation:SELect................................................................................................................159
[SENSe][:LTE]:CARRier:SELect....................................................................................................................159
[SENSe][:LTE]:DL:DEMod:AUTO.................................................................................................................. 127
[SENSe][:LTE]:DL:DEMod:BESTimation....................................................................................................... 149
[SENSe][:LTE]:DL:DEMod:CBSCrambling.................................................................................................... 148
[SENSe][:LTE]:DL:DEMod:CESTimation.......................................................................................................149
[SENSe][:LTE]:DL:DEMod:DACHannels....................................................................................................... 148
[SENSe][:LTE]:DL:DEMod:EVMCalc............................................................................................................. 148
[SENSe][:LTE]:DL:DEMod:MCFilter.............................................................................................................. 147
[SENSe][:LTE]:DL:DEMod:PRData............................................................................................................... 149
[SENSe][:LTE]:DL:FORMat:PSCD................................................................................................................ 127
[SENSe][:LTE]:DL:TRACking:PHASe............................................................................................................150
[SENSe][:LTE]:DL:TRACking:TIME............................................................................................................... 150
[SENSe][:LTE]:FRAMe:COUNt......................................................................................................................143
[SENSe][:LTE]:FRAMe:COUNt:AUTO...........................................................................................................143
[SENSe][:LTE]:FRAMe:COUNt:STATe..........................................................................................................143
[SENSe][:LTE]:FRAMe:SCOunt.....................................................................................................................144
[SENSe][:LTE]:LOCation:SELect...................................................................................................................160
[SENSe][:LTE]:MODulation:SELect............................................................................................................... 160
[SENSe][:LTE]:SUBFrame:SELect................................................................................................................ 160
[SENSe][:LTE]:SYMBol:SELect.....................................................................................................................161
CALCulate:MARKer:COUPling...................................................................................................................... 162
CALCulate<n>:DELTamarker<m>:X............................................................................................................. 113
CALCulate<n>:DELTamarker<m>:Y?........................................................................................................... 113
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP:MAXimum:RESult..............................................................115
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSQP[:AVERage]:RESult?...........................................................115
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF:MAXimum:RESult.............................................................. 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSSF[:AVERage]:RESult?........................................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST:MAXimum:RESult.............................................................. 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:DSST[:AVERage]:RESult?........................................................... 116
CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel:MAXimum:RESult........................................................117
CALCulate<n>:LIMit<k>:SUMMary:EVM:PCHannel[:AVERage]:RESult?.................................................... 117
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal:MAXimum:RESult...........................................................117
CALCulate<n>:LIMit<k>:SUMMary:EVM:PSIGnal[:AVERage]:RESult?....................................................... 117
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL]:MAXimum:RESult................................................................115
CALCulate<n>:LIMit<k>:SUMMary:EVM[:ALL][:AVERage]:RESult?............................................................ 115
CALCulate<n>:LIMit<k>:SUMMary:FERRor:MAXimum:RESult....................................................................117
CALCulate<n>:LIMit<k>:SUMMary:FERRor[:AVERage]:RESult?.................................................................117
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance:MAXimum:RESult............................................................. 118
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List of Commands
CALCulate<n>:LIMit<k>:SUMMary:GIMBalance[:AVERage]:RESult?..........................................................118
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset:MAXimum:RESult.................................................................. 118
CALCulate<n>:LIMit<k>:SUMMary:IQOFfset[:AVERage]:RESult?............................................................... 118
CALCulate<n>:LIMit<k>:SUMMary:QUADerror:MAXimum:RESult...............................................................119
CALCulate<n>:LIMit<k>:SUMMary:QUADerror[:AVERage]:RESult?............................................................119
CALCulate<n>:LIMit<k>:SUMMary:SERRor:MAXimum:RESult....................................................................119
CALCulate<n>:LIMit<k>:SUMMary:SERRor[:AVERage]:RESult?................................................................ 119
CALCulate<n>:MARKer<m>:X...................................................................................................................... 113
CALCulate<n>:MARKer<m>:Y?.................................................................................................................... 114
CALCulate<n>:UNIT:POWer......................................................................................................................... 154
CONFigure[:LTE]:DL:BF:AP.......................................................................................................................... 158
CONFigure[:LTE]:DL:CSIRs:CI......................................................................................................................135
CONFigure[:LTE]:DL:CSIRs:NAP..................................................................................................................135
CONFigure[:LTE]:DL:CSIRs:OPDSch........................................................................................................... 136
CONFigure[:LTE]:DL:CSIRs:POWer............................................................................................................. 136
CONFigure[:LTE]:DL:CSIRs:SCI................................................................................................................... 136
CONFigure[:LTE]:DL:CSIRs:STATe.............................................................................................................. 136
CONFigure[:LTE]:DL:CSUBframes................................................................................................................127
CONFigure[:LTE]:DL:EPDCch:LOCalized..................................................................................................... 137
CONFigure[:LTE]:DL:EPDCch:NPRB............................................................................................................137
CONFigure[:LTE]:DL:EPDCch:POWer.......................................................................................................... 137
CONFigure[:LTE]:DL:EPDCch:RBASsign..................................................................................................... 138
CONFigure[:LTE]:DL:EPDCch:SID................................................................................................................138
CONFigure[:LTE]:DL:MIMO:CROSstalk........................................................................................................ 148
CONFigure[:LTE]:DL:PBCH:POWer..............................................................................................................138
CONFigure[:LTE]:DL:PBCH:STAT................................................................................................................ 138
CONFigure[:LTE]:DL:PCFich:POWer............................................................................................................ 139
CONFigure[:LTE]:DL:PCFich:STAT...............................................................................................................139
CONFigure[:LTE]:DL:PDCCh:FORMat..........................................................................................................139
CONFigure[:LTE]:DL:PDCCh:NOPD............................................................................................................. 139
CONFigure[:LTE]:DL:PDCCh:POWer............................................................................................................140
CONFigure[:LTE]:DL:PDSCh:PB...................................................................................................................142
CONFigure[:LTE]:DL:PHICh:DURation......................................................................................................... 140
CONFigure[:LTE]:DL:PHICh:MITM................................................................................................................140
CONFigure[:LTE]:DL:PHICh:NGParameter...................................................................................................141
CONFigure[:LTE]:DL:PHICh:NOGRoups...................................................................................................... 141
CONFigure[:LTE]:DL:PHICh:POWer............................................................................................................. 141
CONFigure[:LTE]:DL:PRSS:BW.................................................................................................................... 134
CONFigure[:LTE]:DL:PRSS:CI...................................................................................................................... 134
CONFigure[:LTE]:DL:PRSS:NPRS................................................................................................................134
CONFigure[:LTE]:DL:PRSS:POWer.............................................................................................................. 134
CONFigure[:LTE]:DL:PRSS:STATe...............................................................................................................135
CONFigure[:LTE]:DL:PSOFfset..................................................................................................................... 142
CONFigure[:LTE]:DL:REFSig:POWer........................................................................................................... 133
CONFigure[:LTE]:DL:SFNO...........................................................................................................................135
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALCount.................................................................................128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:GAP........................................................ 128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:POWer.................................................... 128
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:AP....................................... 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CBINdex..............................129
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List of Commands
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CDD.................................... 129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:CLMapping..........................129
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding:SCID....................................130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PRECoding[:SCHeme]............................130
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:PSOFfset................................................ 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBCount................................................. 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:RBOFfset................................................ 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>:UEID....................................................... 131
CONFigure[:LTE]:DL:SUBFrame<subframe>:ALLoc<allocation>[:CW<Cwnum>]:MODulation....................132
CONFigure[:LTE]:DL:SYNC:PPOWer........................................................................................................... 133
CONFigure[:LTE]:DL:SYNC:SPOWer........................................................................................................... 133
CONFigure[:LTE]:DL[:CC<cci>]:BW.............................................................................................................. 122
CONFigure[:LTE]:DL[:CC<cci>]:CYCPrefix................................................................................................... 122
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:ASELection...................................................................................... 126
CONFigure[:LTE]:DL[:CC<cci>]:MIMO:CONFig............................................................................................ 126
CONFigure[:LTE]:DL[:CC<cci>]:PLC:CID......................................................................................................122
CONFigure[:LTE]:DL[:CC<cci>]:PLC:CIDGroup............................................................................................123
CONFigure[:LTE]:DL[:CC<cci>]:PLC:PLID....................................................................................................123
CONFigure[:LTE]:DL[:CC<cci>]:SYNC:ANTenna..........................................................................................132
CONFigure[:LTE]:DL[:CC<cci>]:TDD:SPSC..................................................................................................123
CONFigure[:LTE]:DL[:CC<cci>]:TDD:UDConf...............................................................................................124
CONFigure[:LTE]:DUPLexing........................................................................................................................121
CONFigure[:LTE]:LDIRection........................................................................................................................ 124
CONFigure[:LTE]:MEASurement...................................................................................................................120
DISPlay[:WINDow<n>]:SELect........................................................................................................................82
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:AUTO ONCE........................................................................ 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MAXimum............................................................................. 161
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:MINimum.............................................................................. 162
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel..................................................................................154
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet.................................................................... 155
FETCh:SUMMary:TFRame?..........................................................................................................................112
FETCh[:CC<cci>]:PLC:CIDGroup?................................................................................................................124
FETCh[:CC<cci>]:PLC:PLID?........................................................................................................................124
FETCh[:CC<cci>]:SUMMary:CRESt[:AVERage]?......................................................................................... 107
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MAXimum?.................................................................................. 105
FETCh[:CC<cci>]:SUMMary:EVM:DSQP:MINimum?................................................................................... 105
FETCh[:CC<cci>]:SUMMary:EVM:DSQP[:AVERage]?................................................................................. 105
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MAXimum?...................................................................................106
FETCh[:CC<cci>]:SUMMary:EVM:DSSF:MINimum?.................................................................................... 106
FETCh[:CC<cci>]:SUMMary:EVM:DSSF[:AVERage]?..................................................................................106
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MAXimum?...................................................................................105
FETCh[:CC<cci>]:SUMMary:EVM:DSST:MINimum?.................................................................................... 105
FETCh[:CC<cci>]:SUMMary:EVM:DSST[:AVERage]?..................................................................................105
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MAXimum?............................................................................ 108
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel:MINimum?............................................................................. 108
FETCh[:CC<cci>]:SUMMary:EVM:PCHannel[:AVERage]?...........................................................................108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MAXimum?............................................................................... 108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal:MINimum?................................................................................ 108
FETCh[:CC<cci>]:SUMMary:EVM:PSIGnal[:AVERage]?..............................................................................108
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MAXimum?.................................................................................... 107
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List of Commands
FETCh[:CC<cci>]:SUMMary:EVM[:ALL]:MINimum?..................................................................................... 107
FETCh[:CC<cci>]:SUMMary:EVM[:ALL][:AVERage]?...................................................................................107
FETCh[:CC<cci>]:SUMMary:FERRor:MAXimum?........................................................................................ 109
FETCh[:CC<cci>]:SUMMary:FERRor:MINimum?......................................................................................... 109
FETCh[:CC<cci>]:SUMMary:FERRor[:AVERage]?....................................................................................... 109
FETCh[:CC<cci>]:SUMMary:GIMBalance:MAXimum?................................................................................. 109
FETCh[:CC<cci>]:SUMMary:GIMBalance:MINimum?...................................................................................109
FETCh[:CC<cci>]:SUMMary:GIMBalance[:AVERage]?................................................................................ 109
FETCh[:CC<cci>]:SUMMary:IQOFfset:MAXimum?.......................................................................................109
FETCh[:CC<cci>]:SUMMary:IQOFfset:MINimum?........................................................................................109
FETCh[:CC<cci>]:SUMMary:IQOFfset[:AVERage]?..................................................................................... 109
FETCh[:CC<cci>]:SUMMary:OSTP:MAXimum?........................................................................................... 110
FETCh[:CC<cci>]:SUMMary:OSTP:MINimum?.............................................................................................110
FETCh[:CC<cci>]:SUMMary:OSTP[:AVERage]?.......................................................................................... 110
FETCh[:CC<cci>]:SUMMary:POWer:MAXimum?......................................................................................... 110
FETCh[:CC<cci>]:SUMMary:POWer:MINimum?...........................................................................................110
FETCh[:CC<cci>]:SUMMary:POWer[:AVERage]?........................................................................................ 110
FETCh[:CC<cci>]:SUMMary:QUADerror:MAXimum?................................................................................... 111
FETCh[:CC<cci>]:SUMMary:QUADerror:MINimum?.................................................................................... 111
FETCh[:CC<cci>]:SUMMary:QUADerror[:AVERage]?.................................................................................. 111
FETCh[:CC<cci>]:SUMMary:RSSI:MAXimum?.............................................................................................111
FETCh[:CC<cci>]:SUMMary:RSSI:MINimum?.............................................................................................. 111
FETCh[:CC<cci>]:SUMMary:RSSI[:AVERage]?............................................................................................111
FETCh[:CC<cci>]:SUMMary:RSTP:MAXimum?............................................................................................111
FETCh[:CC<cci>]:SUMMary:RSTP:MINimum?.............................................................................................111
FETCh[:CC<cci>]:SUMMary:RSTP[:AVERage]?.......................................................................................... 111
FETCh[:CC<cci>]:SUMMary:SERRor:MAXimum?........................................................................................ 112
FETCh[:CC<cci>]:SUMMary:SERRor:MINimum?......................................................................................... 112
FETCh[:CC<cci>]:SUMMary:SERRor[:AVERage]?.......................................................................................112
FORMat[:DATA].............................................................................................................................................104
INPut:ATTenuation........................................................................................................................................ 155
INPut:ATTenuation:AUTO............................................................................................................................. 155
INPut:COUPling.............................................................................................................................................156
INPut:FILTer:HPASs[:STATe]........................................................................................................................151
INPut:FILTer:YIG[:STATe]............................................................................................................................. 151
INPut:GAIN:STATe........................................................................................................................................156
INPut:GAIN[:VALue]...................................................................................................................................... 156
INPut:IMPedance...........................................................................................................................................157
INPut:SELect................................................................................................................................................. 151
INPut<n>:EATT..............................................................................................................................................157
INPut<n>:EATT:AUTO...................................................................................................................................157
INPut<n>:EATT:STATe................................................................................................................................. 157
INSTrument[:SELect].......................................................................................................................................82
LAYout:ADD[:WINDow]?................................................................................................................................. 87
LAYout:CATalog[:WINDow]?...........................................................................................................................89
LAYout:GLOBal:ADD[:WINDow]?....................................................................................................................83
LAYout:GLOBal:CATalog[:WINDow]?............................................................................................................. 84
LAYout:GLOBal:IDENtify[:WINDow]?.............................................................................................................. 85
LAYout:GLOBal:REMove[:WINDow]............................................................................................................... 86
LAYout:GLOBal:REPLace[:WINDow].............................................................................................................. 86
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LAYout:IDENtify[:WINDow]?............................................................................................................................89
LAYout:REMove[:WINDow]............................................................................................................................. 90
LAYout:REPLace[:WINDow]............................................................................................................................90
LAYout:WINDow<n>:ADD?............................................................................................................................. 91
LAYout:WINDow<n>:IDENtify?........................................................................................................................91
LAYout:WINDow<n>:REMove.........................................................................................................................92
LAYout:WINDow<n>:REPLace........................................................................................................................92
MMEMory:LOAD:DEModsetting.................................................................................................................... 125
MMEMory:LOAD:IQ:STATe...........................................................................................................................120
MMEMory:LOAD:TMOD:DL...........................................................................................................................125
SYSTem:PRESet:CHANnel[:EXECute]......................................................................................................... 120
TRACe<n>[:DATA]?...................................................................................................................................... 104
TRIGger[:SEQuence]:HOLDoff<instrument>.................................................................................................145
TRIGger[:SEQuence]:LEVel<instrument>[:EXTernal]................................................................................... 145
TRIGger[:SEQuence]:PORT<instrument>.....................................................................................................145
TRIGger[:SEQuence]:SLOPe........................................................................................................................ 146
TRIGger[:SEQuence]:SOURce......................................................................................................................146
UNIT:BSTR....................................................................................................................................................162
UNIT:CAXes.................................................................................................................................................. 163
UNIT:EVM......................................................................................................................................................163
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Index
Index
A
AC/DC coupling ................................................................. 63
Allocation ID vs symbol x carrier ....................................... 28
Allocation summary ........................................................... 24
Auto Detection (Cell Identity) ............................................ 39
Auto PDSCH Demodulation .............................................. 41
B
Bit stream .......................................................................... 25
Boosting estimation ........................................................... 66
C
Capture buffer ................................................................... 15
Capture Time .................................................................... 63
CCDF ................................................................................ 23
Cell ID ............................................................................... 39
Cell Identity Group ............................................................ 39
Channel Bandwidth ........................................................... 37
Channel decoder results ................................................... 25
Channel Estimation ........................................................... 66
Channel flatness ............................................................... 21
Channel flatness difference ............................................... 22
Channel flatness group delay ............................................ 22
Closing
Windows (remote) ........................................... 86, 90, 92
Configurable Subframes ................................................... 42
Configuration Table ........................................................... 42
Constellation diagram ....................................................... 23
Constellation Selection ...................................................... 71
Conventions
SCPI commands ......................................................... 77
Coupling
Input (remote) ........................................................... 156
E
Error in Subframes ............................................................ 42
Evaluation methods
Remote ................................................................. 83, 87
EVM Calculation Method ................................................... 68
EVM vs Carrier .................................................................. 16
EVM vs RB ........................................................................ 18
EVM vs subframe .............................................................. 19
EVM vs symbol ................................................................. 17
EVM vs symbol x carrier ................................................... 27
External Attenuation .......................................................... 62
F
High-pass filter
Remote ..................................................................... 151
RF input ...................................................................... 59
I
Identity (Physical Layer) .................................................... 39
Impedance
Remote ..................................................................... 157
Setting ......................................................................... 63
Input
Coupling ...................................................................... 63
Coupling (remote) ..................................................... 156
RF ............................................................................... 60
M
Marker table
Evaluation method ...................................................... 31
Markers
Querying position (remote) ....................................... 114
Table (evaluation method) .......................................... 31
Measurement
alloc ID vs sym x carrier .............................................. 28
allocation summary ..................................................... 24
bit stream .................................................................... 25
capture buffer .............................................................. 15
CCDF .......................................................................... 23
channel decoder results .............................................. 25
channel flatness .......................................................... 21
channel flatness difference ......................................... 22
channel flatness grdel ................................................. 22
constellation ................................................................ 23
EVM vs carrier ............................................................ 16
EVM vs RB ................................................................. 18
EVM vs subframe ....................................................... 19
EVM vs sym x carr ...................................................... 27
EVM vs symbol ........................................................... 17
freq err vs symbol ....................................................... 19
numerical .................................................................... 29
power spectrum .......................................................... 20
power vs RB PDSCH .................................................. 20
power vs RB RS ......................................................... 21
power vs sym x carr .................................................... 28
result summary ........................................................... 29
Multicarrier filter ................................................................. 67
N
Number of RB ................................................................... 37
Numerical results .............................................................. 29
Filters
High-pass (remote) ................................................... 151
High-pass (RF input) ................................................... 59
YIG (remote) ............................................................. 151
Frequency ......................................................................... 61
Frequency error vs symbol ................................................ 19
O
H
P-/S-SYNC Tx antenna ..................................................... 48
P-SYNC Relative Power ................................................... 48
PBCH ................................................................................ 51
PCFICH ............................................................................. 52
PDSCH reference data ..................................................... 68
Hardware settings
Displayed .................................................................... 11
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High-pass filter .................................................... 59, 151
P
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PDSCH subframe detection .............................................. 41
Phase Error ....................................................................... 66
PHICH ............................................................................... 53
Power spectrum ................................................................ 20
Power vs RB PDSCH ........................................................ 20
Power vs RB RS ............................................................... 21
Power vs symbol x carrier ................................................. 28
PRB symbol offset ............................................................. 51
Presetting
Channels ..................................................................... 35
R
Reference Level ................................................................ 61
Relative power (P-SYNC) ................................................. 48
Relative power (reference signal) ..................................... 49
Relative power (S-SYNC) ................................................. 48
Remote commands
Basics on syntax ......................................................... 77
Boolean values ........................................................... 80
Capitalization .............................................................. 78
Character data ............................................................ 81
Data blocks ................................................................. 81
Numeric values ........................................................... 80
Optional keywords ...................................................... 79
Parameters ................................................................. 79
Strings ......................................................................... 81
Suffixes ....................................................................... 78
Resource Blocks ............................................................... 37
Restoring
Channel settings ......................................................... 35
Result Display
Constellation Selection ............................................... 71
Result displays
Marker table ................................................................ 31
Result summary ................................................................ 29
RF input
Remote ..................................................................... 151
S
Scrambling of coded bits ................................................... 67
Selected Subframe ............................................................ 42
Setting
P-/S-SYNC Tx antenna ............................................... 48
Settings
Auto ............................................................................ 39
Auto PDSCH Demod .................................................. 41
boosting estimation ..................................................... 66
Capture Time .............................................................. 63
Cell ID ......................................................................... 39
Cell Identity Group ...................................................... 39
Channel Bandwidth ..................................................... 37
Channel Estimation ..................................................... 66
Configurable Subframes ............................................. 42
Configuration Table .................................................... 42
Error in Subframe ....................................................... 42
EVM Calculation Method ............................................ 68
Ext Att ......................................................................... 62
Frequency ................................................................... 61
Identity ........................................................................ 39
multicarrier filter .......................................................... 67
Number of RB ............................................................. 37
P-SYNC relative power ............................................... 48
PBCH .......................................................................... 51
PCFICH ...................................................................... 52
PDSCH reference data ............................................... 68
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Index
PDSCH subframe detection ........................................ 41
Phase .......................................................................... 66
PHICH ......................................................................... 53
PRB symbol offset ...................................................... 51
Ref Level ..................................................................... 61
relative power ............................................................. 49
S-SYNC relative power ............................................... 48
Scrambling of coded bits ............................................ 67
Selected Subframe ..................................................... 42
Standard ..................................................................... 36
Swap I/Q ..................................................................... 64
TDD UL/DL Allocations ............................................... 38
Timing ......................................................................... 67
Used Allocations ......................................................... 42
Signal source
Remote ..................................................................... 151
Slope
Trigger ...................................................................... 146
Softkey
Const Selection ........................................................... 71
Specifics for
Configuration .............................................................. 35
Standard Selection ............................................................ 36
Subframe Configuration Table .......................................... 42
Subframe Error .................................................................. 42
Suffixes
Remote commands ..................................................... 78
Swap I/Q ........................................................................... 64
T
TDD UL/DL Allocations ..................................................... 38
Timing Error ...................................................................... 67
Trigger
External (remote) ...................................................... 146
Slope ......................................................................... 146
U
Used Allocations ............................................................... 42
User manuals ...................................................................... 8
W
Window title bar information .............................................. 12
Windows
Adding (remote) .................................................... 83, 87
Closing (remote) ............................................. 86, 90, 92
Configuring ................................................................. 35
Querying (remote) ........................................... 84, 85, 89
Replacing (remote) ............................................... 86, 90
Types (remote) ..................................................... 83, 87
Y
YIG-preselector
Activating/Deactivating ............................................... 59
Activating/Deactivating (remote) ............................... 151
175